CVE-2019-5419

Denial of Service Vulnerability in Action View

Impact

Specially crafted accept headers can cause the Action View template location code to consume 100% CPU, causing the server unable to process requests. This impacts all Rails applications that render views.

All users running an affected release should either upgrade or use one of the workarounds immediately.

Releases

The 6.0.0.beta3, 5.2.2.1, 5.1.6.2, 5.0.7.2, and 4.2.11.1 releases are available at the normal locations.

Workarounds

This vulnerability can be mitigated by wrapping render calls with respond_to blocks. For example, the following example is vulnerable:

class UserController < ApplicationController 
  def index 
    render "index" 
  end 
end 

But the following code is not vulnerable:

class UserController < ApplicationController 
  def index 
    respond_to |format| 
      format.html { render "index" } 
    end 
  end 
end 

Implicit rendering is impacted, so this code is vulnerable:

class UserController < ApplicationController 
  def index 
  end 
end 

But can be changed this this:

class UserController < ApplicationController 
  def index 
    respond_to |format| 
      format.html { render "index" } 
    end 
  end 
end 

Alternatively to specifying the format, the following monkey patch can be applied in an initializer:

$ cat config/initializers/formats_filter.rb 
# frozen_string_literal: true 

ActionDispatch::Request.prepend(Module.new do 
  def formats 
    super().select do |format| 
      format.symbol || format.ref == "*/*" 
    end 
  end 
end) 

Please note that only the 5.2.x, 5.1.x, 5.0.x, and 4.2.x series are supported at present. Users of earlier unsupported releases are advised to upgrade as soon as possible as we cannot guarantee the continued availability of security fixes for unsupported releases.

Also note that the patches for this vulnerability are the same as CVE-2019-5418.

Credits

Thanks to John Hawthorn [email protected] of GitHub

There is a possible denial of service vulnerability in Action View (Rails) <5.2.2.1, <5.1.6.2, <5.0.7.2, <4.2.11.1 where specially crafted accept headers can cause action view to consume 100% cpu and make the server unresponsive.

This update for rubygem-actionpack-5_1 fixes the following issues:

Security issues fixed:

• CVE-2019-5418: Fixed a file content disclosure vulnerability in Action View which could be exploited via specially crafted accept headers in combination with calls to render file (bsc#1129272).
• CVE-2019-5419: Fixed a resource exhaustion issue in Action View which could make the server unable to process requests (bsc#1129271).

This update was imported from the SUSE:SLE-15:Update update project.

This update for rmt-server to version 2.1.4 fixes the following issues:

• Fix duplicate nginx location in rmt-server-pubcloud (bsc#1135222)
• Mirror additional repos that were enabled during mirroring (bsc#1132690)
• Make service IDs consistent across different RMT instances (bsc#1134428)
• Make SMT data import scripts faster (bsc#1134190)
• Fix incorrect triggering of registration sharing (bsc#1129392)
• Fix license mirroring issue in some non-SUSE repositories (bsc#1128858)
• Set CURLOPT_LOW_SPEED_LIMIT to prevent downloads from getting stuck (bsc#1107806)
• Truncate the RMT lockfile when writing a new PID (bsc#1125770)
• Fix missing trailing slashes on custom repository import from SMT (bsc#1118745)
• Zypper authentication plugin (fate#326629)
• Instance verification plugin in rmt-server-pubcloud (fate#326629)
• Update dependencies to fix vulnerabilities in rails (CVE-2019-5419, bsc#1129271) and nokogiri (CVE-2019-11068, bsc#1132160)
• Allow RMT registration to work under HTTP as well as HTTPS.
• Offline migration from SLE 15 to SLE 15 SP1 will add Python2 module
• Online migrations will automatically add additional modules to the client systems depending on the base product
• Supply log severity to journald
• Breaking Change: Added headers to generated CSV files

This update was imported from the SUSE:SLE-15:Update update project.

This update for rmt-server to version 2.3.1 fixes the following issues:

• Fix mirroring logic when errors are encountered (bsc#1140492)
• Refactor RMT::Mirror to download metadata/licenses in parallel
• Check repo metadata GPG signatures during mirroring (bsc#1132690)
• Add rmt-server-config subpackage with nginx configs (fate#327816, bsc#1136081)
• Fix dependency to removed boot_cli_i18n file (bsc#1136020)
• Add rmt-cli systems list command to list registered systems
• Fix create UUID when system_uuid file empty (bsc#1138316)
• Fix duplicate nginx location in rmt-server-pubcloud (bsc#1135222)
• Mirror additional repos that were enabled during mirroring (bsc#1132690)
• Make service IDs consistent across different RMT instances (bsc#1134428)
• Make SMT data import scripts faster (bsc#1134190)
• Fix incorrect triggering of registration sharing (bsc#1129392)
• Fix license mirroring issue in some non-SUSE repositories (bsc#1128858)
• Update dependencies to fix vulnerabilities in rails (CVE-2019-5419, bsc#1129271) and nokogiri (CVE-2019-11068, bsc#1132160)
• Allow RMT registration to work under HTTP as well as HTTPS.
• Offline migration from SLE 15 to SLE 15 SP1 will add Python2 module
• Online migrations will automatically add additional modules to the client systems depending on the base product
• Supply log severity to journald
• Breaking Change: Added headers to generated CSV files

This update was imported from the SUSE:SLE-15-SP1:Update update project.

This update for rmt-server fixes the following issues:

Update to version 2.6.5:

• Solved potential bug of SCC repository URLs changing over time. RMT now self heals by removing the previous invalid repository and creating the correct one.
• Add web server settings to /etc/rmt.conf: Now it's possible to configure the minimum and maximum threads count as well the number of web server workers to be booted through /etc/rmt.conf.
• Instead of using an MD5 of URLs for custom repository friendly_ids, RMT now builds an ID from the name.
• Fix RMT file caching based on timestamps: Previously, RMT sent GET requests with the header 'If-Modified-Since' to a repository server and if the response had a 304 (Not Modified), it would copy a file from the local cache instead of downloading. However, if the local file timestamp accidentally changed to a date newer than the one on the repository server, RMT would have an outdated file, which caused some errors. Now, RMT makes HEAD requests to the repositories servers and inspect the 'Last-Modified' header to decide whether to download a file or copy it from cache, by comparing the equalness of timestamps.
• Fixed an issue where relative paths supplied to rmt-cli import repos caused the command to fail.
• Friendlier IDs for custom repositories: In an effort to simplify the handling of SCC and custom repositories, RMT now has friendly IDs. For SCC repositories, it's the same SCC ID as before. For custom repositories, it can either be user provided or RMT generated (MD5 of the provided URL). Benefits:
  • rmt-cli mirror repositories now works for custom repositories.
  • Custom repository IDs can be the same across RMT instances.
  • No more confusing 'SCC ID' vs 'ID' in rmt-cli output. Deprecation Warnings:
  • RMT now uses a different ID for custom repositories than before. RMT still supports that old ID, but it's recommended to start using the new ID to ensure future compatibility.
• Updated rails and puma dependencies for security fixes.

This update was imported from the SUSE:SLE-15-SP2:Update update project.

This update for rmt-server fixes the following issues:

• Version 2.6.5

• Solved potential bug of SCC repository URLs changing over time. RMT now self heals by removing the previous invalid repository and creating the correct one.

• Version 2.6.4

• Add web server settings to /etc/rmt.conf: Now it's possible to configure the minimum and maximum threads count as well the number of web server workers to be booted through /etc/rmt.conf.

• Version 2.6.3

• Instead of using an MD5 of URLs for custom repository friendly_ids, RMT now builds an ID from the name.

• Version 2.6.2

• Fix RMT file caching based on timestamps: Previously, RMT sent GET requests with the header 'If-Modified-Since' to a repository server and if the response had a 304 (Not Modified), it would copy a file from the local cache instead of downloading. However, if the local file timestamp accidentally changed to a date newer than the one on the repository server, RMT would have an outdated file, which caused some errors. Now, RMT makes HEAD requests to the repositories servers and inspect the 'Last-Modified' header to decide whether to download a file or copy it from cache, by comparing the equalness of timestamps.

• Version 2.6.1

• Fixed an issue where relative paths supplied to rmt-cli import repos caused the command to fail.

• Version 2.6.0

• Friendlier IDs for custom repositories: In an effort to simplify the handling of SCC and custom repositories, RMT now has friendly IDs. For SCC repositories, it's the same SCC ID as before. For custom repositories, it can either be user provided or RMT generated (MD5 of the provided URL). Benefits:

  • rmt-cli mirror repositories now works for custom repositories.
  • Custom repository IDs can be the same across RMT instances.
  • No more confusing 'SCC ID' vs 'ID' in rmt-cli output. Deprecation Warnings:
  • RMT now uses a different ID for custom repositories than before. RMT still supports that old ID, but it's recommended to start using the new ID to ensure future compatibility.

• Version 2.5.20

• Updated rails from 6.0.3.2 to 6.0.3.3:

  • actionview (CVE-2020-15169)

• Version 2.5.19

• RMT now has the ability to remove local systems with the command rmt-cli systems remove.

• Version 2.5.18

• Fixed exit code for rmt-cli mirror and its subcommands. Now it exits with 1 whenever an error occurs during mirroring

• Improved message logging for rtm-cli mirror. Instead of logging an error when it occurs, the command summarize all errors at the end of execution. Now log messages have colors to better identify failure/success.

• Version 2.5.17

• RMT no longer provides the installer updates repository to systems via its zypper service. This repository is used during the installation process, as it provides an up-to-date installation experience, but it has no use on an already installed system.

• Version 2.5.16

• Updated RMT's rails and puma dependencies.

  • puma (CVE-2020-11076, CVE-2020-11077, CVE-2020-5249, CVE-2020-5247 CVE-2019-16770)
  • actionpack (CVE-2020-8185, CVE-2020-8164, CVE-2020-8166)
  • actionview (CVE-2020-8167, CVE-2020-5267, CVE-2019-5418, CVE-2019-5419)
  • activesupport (CVE-2020-8165)
  • railties (CVE-2019-5420)

• Version 2.5.15

• RMT now checks if repositories are fully mirrored during the activation process. Previously, RMT only checked if the repositories were enabled to be mirrored, but not that they were actually mirrored. In this case, RMTs were not able to provide the repository data which systems assumed it had.

• Version 2.5.14

• Enable 'Installer-Updates' repositories by default

• Fixed deprecation warning when thor encountered an error. Also, instead of returning 0 for thor errors, rmt-cli will return 1 instead.

• Version 2.5.13

• Added rmt-cli repos clean command to remove locally mirrored files of repositories which are not marked to be mirrored.

• Previously, RMT didn't track…

These are all security issues fixed in the rmt-server-2.6.13-1.1 package on the GA media of openSUSE Tumbleweed.

This update for rubygem-actionpack-4_2 fixes the following issues:

Security issues fixed:

• CVE-2019-5418: Fixed a file content disclosure vulnerability in Action View which could be exploited via specially crafted accept headers in combination with calls to render file (bsc#1129272).
• CVE-2019-5419: Fixed a resource exhaustion issue in Action View which could make the server unable to process requests (bsc#1129271).

This update for rmt-server to version 2.1.4 fixes the following issues:

• Fix duplicate nginx location in rmt-server-pubcloud (bsc#1135222)
• Mirror additional repos that were enabled during mirroring (bsc#1132690)
• Make service IDs consistent across different RMT instances (bsc#1134428)
• Make SMT data import scripts faster (bsc#1134190)
• Fix incorrect triggering of registration sharing (bsc#1129392)
• Fix license mirroring issue in some non-SUSE repositories (bsc#1128858)
• Set CURLOPT_LOW_SPEED_LIMIT to prevent downloads from getting stuck (bsc#1107806)
• Truncate the RMT lockfile when writing a new PID (bsc#1125770)
• Fix missing trailing slashes on custom repository import from SMT (bsc#1118745)
• Zypper authentication plugin (fate#326629)
• Instance verification plugin in rmt-server-pubcloud (fate#326629)
• Update dependencies to fix vulnerabilities in rails (CVE-2019-5419, bsc#1129271) and nokogiri (CVE-2019-11068, bsc#1132160)
• Allow RMT registration to work under HTTP as well as HTTPS.
• Offline migration from SLE 15 to SLE 15 SP1 will add Python2 module
• Online migrations will automatically add additional modules to the client systems depending on the base product
• Supply log severity to journald
• Breaking Change: Added headers to generated CSV files

This update for rmt-server to version 2.3.1 fixes the following issues:

• Fix mirroring logic when errors are encountered (bsc#1140492)
• Refactor RMT::Mirror to download metadata/licenses in parallel
• Check repo metadata GPG signatures during mirroring (bsc#1132690)
• Add rmt-server-config subpackage with nginx configs (fate#327816, bsc#1136081)
• Fix dependency to removed boot_cli_i18n file (bsc#1136020)
• Add rmt-cli systems list command to list registered systems
• Fix create UUID when system_uuid file empty (bsc#1138316)
• Fix duplicate nginx location in rmt-server-pubcloud (bsc#1135222)
• Mirror additional repos that were enabled during mirroring (bsc#1132690)
• Make service IDs consistent across different RMT instances (bsc#1134428)
• Make SMT data import scripts faster (bsc#1134190)
• Fix incorrect triggering of registration sharing (bsc#1129392)
• Fix license mirroring issue in some non-SUSE repositories (bsc#1128858)
• Update dependencies to fix vulnerabilities in rails (CVE-2019-5419, bsc#1129271) and nokogiri (CVE-2019-11068, bsc#1132160)
• Allow RMT registration to work under HTTP as well as HTTPS.
• Offline migration from SLE 15 to SLE 15 SP1 will add Python2 module
• Online migrations will automatically add additional modules to the client systems depending on the base product
• Supply log severity to journald
• Breaking Change: Added headers to generated CSV files

This update for rmt-server fixes the following issues:

Update to version 2.6.5:

• Solved potential bug of SCC repository URLs changing over time. RMT now self heals by removing the previous invalid repository and creating the correct one.
• Add web server settings to /etc/rmt.conf: Now it's possible to configure the minimum and maximum threads count as well the number of web server workers to be booted through /etc/rmt.conf.
• Instead of using an MD5 of URLs for custom repository friendly_ids, RMT now builds an ID from the name.
• Fix RMT file caching based on timestamps: Previously, RMT sent GET requests with the header 'If-Modified-Since' to a repository server and if the response had a 304 (Not Modified), it would copy a file from the local cache instead of downloading. However, if the local file timestamp accidentally changed to a date newer than the one on the repository server, RMT would have an outdated file, which caused some errors. Now, RMT makes HEAD requests to the repositories servers and inspect the 'Last-Modified' header to decide whether to download a file or copy it from cache, by comparing the equalness of timestamps.
• Fixed an issue where relative paths supplied to rmt-cli import repos caused the command to fail.
• Friendlier IDs for custom repositories: In an effort to simplify the handling of SCC and custom repositories, RMT now has friendly IDs. For SCC repositories, it's the same SCC ID as before. For custom repositories, it can either be user provided or RMT generated (MD5 of the provided URL). Benefits:
  • rmt-cli mirror repositories now works for custom repositories.
  • Custom repository IDs can be the same across RMT instances.
  • No more confusing 'SCC ID' vs 'ID' in rmt-cli output. Deprecation Warnings:
  • RMT now uses a different ID for custom repositories than before. RMT still supports that old ID, but it's recommended to start using the new ID to ensure future compatibility.
• Updated rails and puma dependencies for security fixes.

This update for rmt-server fixes the following issues:

• Version 2.6.5

• Solved potential bug of SCC repository URLs changing over time. RMT now self heals by removing the previous invalid repository and creating the correct one.

• Version 2.6.4

• Add web server settings to /etc/rmt.conf: Now it's possible to configure the minimum and maximum threads count as well the number of web server workers to be booted through /etc/rmt.conf.

• Version 2.6.3

• Instead of using an MD5 of URLs for custom repository friendly_ids, RMT now builds an ID from the name.

• Version 2.6.2

• Fix RMT file caching based on timestamps: Previously, RMT sent GET requests with the header 'If-Modified-Since' to a repository server and if the response had a 304 (Not Modified), it would copy a file from the local cache instead of downloading. However, if the local file timestamp accidentally changed to a date newer than the one on the repository server, RMT would have an outdated file, which caused some errors. Now, RMT makes HEAD requests to the repositories servers and inspect the 'Last-Modified' header to decide whether to download a file or copy it from cache, by comparing the equalness of timestamps.

• Version 2.6.1

• Fixed an issue where relative paths supplied to rmt-cli import repos caused the command to fail.

• Version 2.6.0

• Friendlier IDs for custom repositories: In an effort to simplify the handling of SCC and custom repositories, RMT now has friendly IDs. For SCC repositories, it's the same SCC ID as before. For custom repositories, it can either be user provided or RMT generated (MD5 of the provided URL). Benefits:

  • rmt-cli mirror repositories now works for custom repositories.
  • Custom repository IDs can be the same across RMT instances.
  • No more confusing 'SCC ID' vs 'ID' in rmt-cli output. Deprecation Warnings:
  • RMT now uses a different ID for custom repositories than before. RMT still supports that old ID, but it's recommended to start using the new ID to ensure future compatibility.

• Version 2.5.20

• Updated rails from 6.0.3.2 to 6.0.3.3:

  • actionview (CVE-2020-15169)

• Version 2.5.19

• RMT now has the ability to remove local systems with the command rmt-cli systems remove.

• Version 2.5.18

• Fixed exit code for rmt-cli mirror and its subcommands. Now it exits with 1 whenever an error occurrs during mirroring

• Improved message logging for rtm-cli mirror. Instead of logging an error when it occurs, the command summarize all errors at the end of execution. Now log messages have colors to better identify failure/success.

• Version 2.5.17

• RMT no longer provides the installer updates repository to systems via its zypper service. This repository is used during the installation process, as it provides an up-to-date installation experience, but it has no use on an already installed system.

• Version 2.5.16

• Updated RMT's rails and puma dependencies.

  • puma (CVE-2020-11076, CVE-2020-11077, CVE-2020-5249, CVE-2020-5247 CVE-2019-16770)
  • actionpack (CVE-2020-8185, CVE-2020-8164, CVE-2020-8166)
  • actionview (CVE-2020-8167, CVE-2020-5267, CVE-2019-5418, CVE-2019-5419)
  • activesupport (CVE-2020-8165)
  • railties (CVE-2019-5420)

• Version 2.5.15

• RMT now checks if repositories are fully mirrored during the activation process. Previously, RMT only checked if the repositories were enabled to be mirrored, but not that they were actually mirrored. In this case, RMTs were not able to provide the repository data which systems assumed it had.

• Version 2.5.14

• Enable 'Installer-Updates' repositories by default

• Fixed deprecation warning when thor encountered an error. Also, instead of returning 0 for thor errors, rmt-cli will return 1 instead.

• Version 2.5.13

• Added rmt-cli repos clean command to remove locally mirrored files of repositories which are not marked to be mirrored.

• Previously, RMT didn't track…

This update for rmt-server fixes the following issues:

• Version 2.6.5

• Solved potential bug of SCC repository URLs changing over time. RMT now self heals by removing the previous invalid repository and creating the correct one.

• Version 2.6.4

• Add web server settings to /etc/rmt.conf: Now it's possible to configure the minimum and maximum threads count as well the number of web server workers to be booted through /etc/rmt.conf.

• Version 2.6.3

• Instead of using an MD5 of URLs for custom repository friendly_ids, RMT now builds an ID from the name.

• Version 2.6.2

• Fix RMT file caching based on timestamps: Previously, RMT sent GET requests with the header 'If-Modified-Since' to a repository server and if the response had a 304 (Not Modified), it would copy a file from the local cache instead of downloading. However, if the local file timestamp accidentally changed to a date newer than the one on the repository server, RMT would have an outdated file, which caused some errors. Now, RMT makes HEAD requests to the repositories servers and inspect the 'Last-Modified' header to decide whether to download a file or copy it from cache, by comparing the equalness of timestamps.

• Version 2.6.1

• Fixed an issue where relative paths supplied to rmt-cli import repos caused the command to fail.

• Version 2.6.0

• Friendlier IDs for custom repositories: In an effort to simplify the handling of SCC and custom repositories, RMT now has friendly IDs. For SCC repositories, it's the same SCC ID as before. For custom repositories, it can either be user provided or RMT generated (MD5 of the provided URL). Benefits:

  • rmt-cli mirror repositories now works for custom repositories.
  • Custom repository IDs can be the same across RMT instances.
  • No more confusing 'SCC ID' vs 'ID' in rmt-cli output. Deprecation Warnings:
  • RMT now uses a different ID for custom repositories than before. RMT still supports that old ID, but it's recommended to start using the new ID to ensure future compatibility.

• Version 2.5.20

• Updated rails from 6.0.3.2 to 6.0.3.3:

  • actionview (CVE-2020-15169)

• Version 2.5.19

• RMT now has the ability to remove local systems with the command rmt-cli systems remove.

• Version 2.5.18

• Fixed exit code for rmt-cli mirror and its subcommands. Now it exits with 1 whenever an error occurs during mirroring

• Improved message logging for rtm-cli mirror. Instead of logging an error when it occurs, the command summarize all errors at the end of execution. Now log messages have colors to better identify failure/success.

• Version 2.5.17

• RMT no longer provides the installer updates repository to systems via its zypper service. This repository is used during the installation process, as it provides an up-to-date installation experience, but it has no use on an already installed system.

• Version 2.5.16

• Updated RMT's rails and puma dependencies.

  • puma (CVE-2020-11076, CVE-2020-11077, CVE-2020-5249, CVE-2020-5247 CVE-2019-16770)
  • actionpack (CVE-2020-8185, CVE-2020-8164, CVE-2020-8166)
  • actionview (CVE-2020-8167, CVE-2020-5267, CVE-2019-5418, CVE-2019-5419)
  • activesupport (CVE-2020-8165)
  • railties (CVE-2019-5420)

• Version 2.5.15

• RMT now checks if repositories are fully mirrored during the activation process. Previously, RMT only checked if the repositories were enabled to be mirrored, but not that they were actually mirrored. In this case, RMTs were not able to provide the repository data which systems assumed it had.

• Version 2.5.14

• Enable 'Installer-Updates' repositories by default

• Fixed deprecation warning when thor encountered an error. Also, instead of returning 0 for thor errors, rmt-cli will return 1 instead.

• Version 2.5.13

• Added rmt-cli repos clean command to remove locally mirrored files of repositories which are not marked to be mirrored.

• Previously, RMT didn't track…