CVE-2019-8320

A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.

A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.

A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

Updated ruby-RubyGems package fixes security vulnerabilities

The following vulnerabilities have been reported.

CVE-2019-8320: Delete directory using symlink when decompressing tar CVE-2019-8321: Escape sequence injection vulnerability in verbose CVE-2019-8322: Escape sequence injection vulnerability in gem owner CVE-2019-8323: Escape sequence injection vulnerability in API response handling CVE-2019-8324: Installing a malicious gem may lead to arbitrary code execution CVE-2019-8325: Escape sequence injection vulnerability in errors

Response Splitting attack in the HTTP server of WEBrick (CVE-2017-17742).

Delete directory using symlink when decompressing tar (CVE-2019-8320).

Escape sequence injection vulnerability in verbose (CVE-2019-8321).

Escape sequence injection vulnerability in gem owner (CVE-2019-8322).

Escape sequence injection vulnerability in API response handling (CVE-2019-8323).

Installing a malicious gem may lead to arbitrary code execution (CVE-2019-8324).

Escape sequence injection vulnerability in errors (CVE-2019-8325).

Regular Expression Denial of Service vulnerability of WEBrick's Digest access authentication (CVE-2019-16201).

HTTP Response Splitting attack in the HTTP server of WEBrick (CVE-2019-16254).

Code injection vulnerability (CVE-2019-16255).

A potential HTTP request smuggling vulnerability in WEBrick was reported. WEBrick (bundled along with jruby) was too tolerant against an invalid Transfer-Encoding header. This may lead to inconsistent interpretation between WEBrick and some HTTP proxy servers, which may allow the attacker to "smuggle" a request (CVE-2020-25613).

This update for ruby2.5 and ruby-bundled-gems-rpmhelper fixes the following issues:

Changes in ruby2.5:

Update to 2.5.5 and 2.5.4:

https://www.ruby-lang.org/en/news/2019/03/15/ruby-2-5-5-released/ https://www.ruby-lang.org/en/news/2019/03/13/ruby-2-5-4-released/

Security issues fixed:

• CVE-2019-8320: Delete directory using symlink when decompressing tar (bsc#1130627)
• CVE-2019-8321: Escape sequence injection vulnerability in verbose (bsc#1130623)
• CVE-2019-8322: Escape sequence injection vulnerability in gem owner (bsc#1130622)
• CVE-2019-8323: Escape sequence injection vulnerability in API response handling (bsc#1130620)
• CVE-2019-8324: Installing a malicious gem may lead to arbitrary code execution (bsc#1130617)
• CVE-2019-8325: Escape sequence injection vulnerability in errors (bsc#1130611)

Ruby 2.5 was updated to 2.5.3:

This release includes some bug fixes and some security fixes.

Security issues fixed:

• CVE-2018-16396: Tainted flags are not propagated in Array#pack and String#unpack with some directives (bsc#1112532)
• CVE-2018-16395: OpenSSL::X509::Name equality check does not work correctly (bsc#1112530)

Ruby 2.5 was updated to 2.5.1:

This release includes some bug fixes and some security fixes.

Security issues fixed:

• CVE-2017-17742: HTTP response splitting in WEBrick (bsc#1087434)

• CVE-2018-6914: Unintentional file and directory creation with directory traversal in tempfile and tmpdir (bsc#1087441)

• CVE-2018-8777: DoS by large request in WEBrick (bsc#1087436)

• CVE-2018-8778: Buffer under-read in String#unpack (bsc#1087433)

• CVE-2018-8779: Unintentional socket creation by poisoned NUL byte in UNIXServer and UNIXSocket (bsc#1087440)

• CVE-2018-8780: Unintentional directory traversal by poisoned NUL byte in Dir (bsc#1087437)

• Multiple vulnerabilities in RubyGems were fixed:

  • CVE-2018-1000079: Fixed path traversal issue during gem installation allows to write to arbitrary filesystem locations (bsc#1082058)
  • CVE-2018-1000075: Fixed infinite loop vulnerability due to negative size in tar header causes Denial of Service (bsc#1082014)
  • CVE-2018-1000078: Fixed XSS vulnerability in homepage attribute when displayed via gem server (bsc#1082011)
  • CVE-2018-1000077: Fixed that missing URL validation on spec home attribute allows malicious gem to set an invalid homepage URL (bsc#1082010)
  • CVE-2018-1000076: Fixed improper verification of signatures in tarball allows to install mis-signed gem (bsc#1082009)
  • CVE-2018-1000074: Fixed unsafe Object Deserialization Vulnerability in gem owner allowing arbitrary code execution on specially crafted YAML (bsc#1082008)
  • CVE-2018-1000073: Fixed path traversal when writing to a symlinked basedir outside of the root (bsc#1082007)

Other changes:

• Fixed Net::POPMail methods modify frozen literal when using default arg
• ruby: change over of the Japanese Era to the new emperor May 1st 2019 (bsc#1133790)
• build with PIE support (bsc#1130028)

Changes in ruby-bundled-gems-rpmhelper:

• Add a new helper for bundled ruby gems.

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

This update for ruby2.5 and ruby-bundled-gems-rpmhelper fixes the following issues:

Changes in ruby2.5:

Update to 2.5.5 and 2.5.4:

https://www.ruby-lang.org/en/news/2019/03/15/ruby-2-5-5-released/ https://www.ruby-lang.org/en/news/2019/03/13/ruby-2-5-4-released/

Security issues fixed:

• CVE-2019-8320: Delete directory using symlink when decompressing tar (bsc#1130627)
• CVE-2019-8321: Escape sequence injection vulnerability in verbose (bsc#1130623)
• CVE-2019-8322: Escape sequence injection vulnerability in gem owner (bsc#1130622)
• CVE-2019-8323: Escape sequence injection vulnerability in API response handling (bsc#1130620)
• CVE-2019-8324: Installing a malicious gem may lead to arbitrary code execution (bsc#1130617)
• CVE-2019-8325: Escape sequence injection vulnerability in errors (bsc#1130611)

Ruby 2.5 was updated to 2.5.3:

This release includes some bug fixes and some security fixes.

Security issues fixed:

• CVE-2018-16396: Tainted flags are not propagated in Array#pack and String#unpack with some directives (bsc#1112532)
• CVE-2018-16395: OpenSSL::X509::Name equality check does not work correctly (bsc#1112530)

Ruby 2.5 was updated to 2.5.1:

This release includes some bug fixes and some security fixes.

Security issues fixed:

• CVE-2017-17742: HTTP response splitting in WEBrick (bsc#1087434)

• CVE-2018-6914: Unintentional file and directory creation with directory traversal in tempfile and tmpdir (bsc#1087441)

• CVE-2018-8777: DoS by large request in WEBrick (bsc#1087436)

• CVE-2018-8778: Buffer under-read in String#unpack (bsc#1087433)

• CVE-2018-8779: Unintentional socket creation by poisoned NUL byte in UNIXServer and UNIXSocket (bsc#1087440)

• CVE-2018-8780: Unintentional directory traversal by poisoned NUL byte in Dir (bsc#1087437)

• Multiple vulnerabilities in RubyGems were fixed:

  • CVE-2018-1000079: Fixed path traversal issue during gem installation allows to write to arbitrary filesystem locations (bsc#1082058)
  • CVE-2018-1000075: Fixed infinite loop vulnerability due to negative size in tar header causes Denial of Service (bsc#1082014)
  • CVE-2018-1000078: Fixed XSS vulnerability in homepage attribute when displayed via gem server (bsc#1082011)
  • CVE-2018-1000077: Fixed that missing URL validation on spec home attribute allows malicious gem to set an invalid homepage URL (bsc#1082010)
  • CVE-2018-1000076: Fixed improper verification of signatures in tarball allows to install mis-signed gem (bsc#1082009)
  • CVE-2018-1000074: Fixed unsafe Object Deserialization Vulnerability in gem owner allowing arbitrary code execution on specially crafted YAML (bsc#1082008)
  • CVE-2018-1000073: Fixed path traversal when writing to a symlinked basedir outside of the root (bsc#1082007)

Other changes:

• Fixed Net::POPMail methods modify frozen literal when using default arg
• ruby: change over of the Japanese Era to the new emperor May 1st 2019 (bsc#1133790)
• build with PIE support (bsc#1130028)

Changes in ruby-bundled-gems-rpmhelper:

• Add a new helper for bundled ruby gems.

This update for ruby2.1 fixes the following issues:

Security issues fixed:

• CVE-2015-9096: Fixed an SMTP command injection via CRLFsequences in a RCPT TO or MAIL FROM command (bsc#1043983).
• CVE-2016-7798: Fixed an IV Reuse in GCM Mode (bsc#1055265).
• CVE-2017-0898: Fixed a buffer underrun vulnerability in Kernel.sprintf (bsc#1058755).
• CVE-2017-0899: Fixed an issue with malicious gem specifications, insufficient sanitation when printing gem specifications could have included terminal characters (bsc#1056286).
• CVE-2017-0900: Fixed an issue with malicious gem specifications, the query command could have led to a denial of service attack against clients (bsc#1056286).
• CVE-2017-0901: Fixed an issue with malicious gem specifications, potentially overwriting arbitrary files on the client system (bsc#1056286).
• CVE-2017-0902: Fixed an issue with malicious gem specifications, that could have enabled MITM attacks against clients (bsc#1056286).
• CVE-2017-0903: Fixed an unsafe object deserialization vulnerability (bsc#1062452).
• CVE-2017-9228: Fixed a heap out-of-bounds write in bitset_set_range() during regex compilation (bsc#1069607).
• CVE-2017-9229: Fixed an invalid pointer dereference in left_adjust_char_head() in oniguruma (bsc#1069632).
• CVE-2017-10784: Fixed an escape sequence injection vulnerability in the Basic authentication of WEBrick (bsc#1058754).
• CVE-2017-14033: Fixed a buffer underrun vulnerability in OpenSSL ASN1 decode (bsc#1058757).
• CVE-2017-14064: Fixed an arbitrary memory exposure during a JSON.generate call (bsc#1056782).
• CVE-2017-17405: Fixed a command injection vulnerability in Net::FTP (bsc#1073002).
• CVE-2017-17742: Fixed an HTTP response splitting issue in WEBrick (bsc#1087434).
• CVE-2017-17790: Fixed a command injection in lib/resolv.rb:lazy_initialize() (bsc#1078782).
• CVE-2018-6914: Fixed an unintentional file and directory creation with directory traversal in tempfile and tmpdir (bsc#1087441).
• CVE-2018-8777: Fixed a potential DoS caused by large requests in WEBrick (bsc#1087436).
• CVE-2018-8778: Fixed a buffer under-read in String#unpack (bsc#1087433).
• CVE-2018-8779: Fixed an unintentional socket creation by poisoned NUL byte in UNIXServer and UNIXSocket (bsc#1087440).
• CVE-2018-8780: Fixed an unintentional directory traversal by poisoned NUL byte in Dir (bsc#1087437).
• CVE-2018-16395: Fixed an issue with OpenSSL::X509::Name equality checking (bsc#1112530).
• CVE-2018-16396: Fixed an issue with tainted string handling, where the flag was not propagated in Array#pack and String#unpack with some directives (bsc#1112532).
• CVE-2018-1000073: Fixed a path traversal issue (bsc#1082007).
• CVE-2018-1000074: Fixed an unsafe object deserialization vulnerability in gem owner, allowing arbitrary code execution with specially crafted YAML (bsc#1082008).
• CVE-2018-1000075: Fixed an infinite loop vulnerability due to negative size in tar header causes Denial of Service (bsc#1082014).
• CVE-2018-1000076: Fixed an improper verification of signatures in tarballs (bsc#1082009).
• CVE-2018-1000077: Fixed an improper URL validation in the homepage attribute of ruby gems (bsc#1082010).
• CVE-2018-1000078: Fixed a XSS vulnerability in the homepage attribute when displayed via gem server (bsc#1082011).
• CVE-2018-1000079: Fixed a path traversal issue during gem installation allows to write to arbitrary filesystem locations (bsc#1082058).
• CVE-2019-8320: Fixed a directory traversal issue when decompressing tar files (bsc#1130627).
• CVE-2019-8321: Fixed an escape sequence injection vulnerability in verbose (bsc#1130623).
• CVE-2019-8322: Fixed an escape sequence injection vulnerability in gem owner (bsc#1130622).
• CVE-2019-8323: Fixed an escape sequence injection vulnerability in API response handling (bsc#1130620).
• CVE-2019-8324: Fixed an issue with malicious gems that may have led to arbitrary code execution (bsc#1130617).
• CVE-2019-8325: Fixed an escape sequence injection vulnerability in…

It was discovered that Ruby incorrectly handled certain RubyGems. An attacker could possibly use this issue to execute arbitrary commands. (CVE-2019-8320)

It was discovered that Ruby incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. (CVE-2019-8321, CVE-2019-8322, CVE-2019-8323, CVE-2019-8324, CVE-2019-8325)