CVE-2018-16844

nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.

nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.

nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.

• CVE-2017-7529: fix integer overflow in range filter
• CVE-2018-16843: fix excessive memory consumption in HTTP/2
• CVE-2018-16844: fix excessive CPU usage in HTTP/2
• CVE-2019-9511: fix excessive memory growth via HTTP/2 DATA frame manipulation
• CVE-2019-9513: fix excessive CPU usage via HTTP/2 PRIORITY frame manipulation

• CVE-2017-7529: fix integer overflow in range filter
• CVE-2018-16843: fix excessive memory consumption in HTTP/2
• CVE-2018-16844: fix excessive CPU usage in HTTP/2
• CVE-2019-9511: fix excessive memory growth via HTTP/2 DATA frame manipulation
• CVE-2019-9513: fix excessive CPU usage via HTTP/2 PRIORITY frame manipulation

nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive memory consumption (CVE-2018-16843).

nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage (CVE-2018-16844).

nginx before versions 1.15.6, 1.14.1 has a vulnerability in the ngx_http_mp4_module, which might allow an attacker to cause infinite loop in a worker process, cause a worker process crash, or might result in worker process memory disclosure by using a specially crafted mp4 file (CVE-2018-16845).

This update for nginx fixes the following issues:

nginx was updated to 1.14.2:

• Bugfix: nginx could not be built on Fedora 28 Linux.
• Bugfix: in handling of client addresses when using unix domain listen sockets to work with datagrams on Linux.
• Change: the logging level of the 'http request', 'https proxy request', 'unsupported protocol', 'version too low', 'no suitable key share', and 'no suitable signature algorithm' SSL errors has been lowered from 'crit' to 'info'.
• Bugfix: when using OpenSSL 1.1.0 or newer it was not possible to switch off 'ssl_prefer_server_ciphers' in a virtual server if it was switched on in the default server.
• Bugfix: nginx could not be built with LibreSSL 2.8.0.
• Bugfix: if nginx was built with OpenSSL 1.1.0 and used with OpenSSL 1.1.1, the TLS 1.3 protocol was always enabled.
• Bugfix: sending a disk-buffered request body to a gRPC backend might fail.
• Bugfix: connections with some gRPC backends might not be cached when using the 'keepalive' directive.
• Bugfix: a segmentation fault might occur in a worker process if the ngx_http_mp4_module was used on 32-bit platforms.

Changes with nginx 1.14.1:

• Security: when using HTTP/2 a client might cause excessive memory consumption (CVE-2018-16843) and CPU usage (CVE-2018-16844).
• Security: processing of a specially crafted mp4 file with the ngx_http_mp4_module might result in worker process memory disclosure (CVE-2018-16845).
• Bugfix: working with gRPC backends might result in excessive memory consumption.

Changes with nginx 1.13.12:

• Bugfix: connections with gRPC backends might be closed unexpectedly when returning a large response.

Changes with nginx 1.13.10

• Feature: the 'set' parameter of the 'include' SSI directive now allows writing arbitrary responses to a variable; the 'subrequest_output_buffer_size' directive defines maximum response size.
• Feature: now nginx uses clock_gettime(CLOCK_MONOTONIC) if available, to avoid timeouts being incorrectly triggered on system time changes.
• Feature: the 'escape=none' parameter of the 'log_format' directive. Thanks to Johannes Baiter and Calin Don.
• Feature: the $ssl_preread_alpn_protocols variable in the ngx_stream_ssl_preread_module.
• Feature: the ngx_http_grpc_module.
• Bugfix: in memory allocation error handling in the 'geo' directive.
• Bugfix: when using variables in the 'auth_basic_user_file' directive a null character might appear in logs. Thanks to Vadim Filimonov.

This update for nginx fixes the following issues:

Security issues fixed:

• CVE-2019-9511: Fixed a denial of service by manipulating the window size and stream prioritization (bsc#1145579).
• CVE-2019-9513: Fixed a denial of service caused by resource loops (bsc#1145580).
• CVE-2019-9516: Fixed a denial of service caused by header leaks (bsc#1145582).
• CVE-2018-16845: Fixed denial of service and memory disclosure via mp4 module (bsc#1115015).
• CVE-2018-16843: Fixed excessive memory consumption in HTTP/2 implementation (bsc#1115022).
• CVE-2018-16844: Fixed excessive CPU usage via flaw in HTTP/2 implementation (bsc#1115025).

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

This update for nginx to version 1.14.2 fixes the following issues:

Security vulnerabilities addressed:

• CVE-2018-16843 CVE-2018-16844: Fixed an issue whereby a client using HTTP/2 might cause excessive memory consumption and CPU usage (bsc#1115025 bsc#1115022).
• CVE-2018-16845: Fixed an issue which might result in worker process memory disclosure whne processing of a specially crafted mp4 file with the ngx_http_mp4_module (bsc#1115015).

Other bug fixes and changes made:

• Fixed an issue with handling of client addresses when using unix domain listen sockets to work with datagrams on Linux.
• The logging level of the 'http request', 'https proxy request', 'unsupported protocol', 'version too low', 'no suitable key share', and 'no suitable signature algorithm' SSL errors has been lowered from 'crit' to 'info'.
• Fixed an issue with using OpenSSL 1.1.0 or newer it was not possible to switch off 'ssl_prefer_server_ciphers' in a virtual server if it was switched on in the default server.
• Fixed an issue with TLS 1.3 always being enabled when built with OpenSSL 1.1.0 and used with 1.1.1
• Fixed an issue with sending a disk-buffered request body to a gRPC backend
• Fixed an issue with connections of some gRPC backends might not be cached when using the 'keepalive' directive.
• Fixed a segmentation fault, which might occur in a worker process if the ngx_http_mp4_module was used on 32-bit platforms.
• Fixed an issue, whereby working with gRPC backends might result in excessive memory consumption.

This update for nginx fixes the following issues:

Security issues fixed:

• CVE-2019-9511: Fixed a denial of service by manipulating the window size and stream prioritization (bsc#1145579).
• CVE-2019-9513: Fixed a denial of service caused by resource loops (bsc#1145580).
• CVE-2019-9516: Fixed a denial of service caused by header leaks (bsc#1145582).
• CVE-2018-16845: Fixed denial of service and memory disclosure via mp4 module (bsc#1115015).
• CVE-2018-16843: Fixed excessive memory consumption in HTTP/2 implementation (bsc#1115022).
• CVE-2018-16844: Fixed excessive CPU usage via flaw in HTTP/2 implementation (bsc#1115025).

It was discovered that nginx incorrectly handled the HTTP/2 implementation. A remote attacker could possibly use this issue to cause excessive memory consumption, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-16843)

Gal Goldshtein discovered that nginx incorrectly handled the HTTP/2 implementation. A remote attacker could possibly use this issue to cause excessive CPU usage, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-16844)

It was discovered that nginx incorrectly handled the ngx_http_mp4_module module. A remote attacker could possibly use this issue with a specially crafted mp4 file to cause nginx to crash, stop responding, or access arbitrary memory. (CVE-2018-16845)