| Summary: | <www-servers/apache-2.4.20: mod_http2 denial-of-service by thread starvation (CVE-2016-1546) | ||
|---|---|---|---|
| Product: | Gentoo Security | Reporter: | Agostino Sarubbo <ago> |
| Component: | Vulnerabilities | Assignee: | Gentoo Security <security> |
| Status: | RESOLVED FIXED | ||
| Severity: | minor | CC: | polynomial-c |
| Priority: | Normal | ||
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux | ||
| URL: | https://bugzilla.redhat.com/show_bug.cgi?id=1336350 | ||
| See Also: | https://bugs.gentoo.org/show_bug.cgi?id=468302 | ||
| Whiteboard: | B3 [glsa cve] | ||
| Package list: | Runtime testing required: | --- | |
| Bug Depends on: | 588138 | ||
| Bug Blocks: | |||
Arches please test and mark stable the following list of packages: =app-admin/apache-tools-2.4.20 =www-servers/apache-2.4.20 Target KEYWORDS are: alpha amd64 arm ~arm64 hppa ia64 ~mips ppc ppc64 ~s390 ~sh sparc x86 ~amd64-fbsd ~sparc-fbsd ~x86-fbsd ~x86-freebsd ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~m68k-mint ~sparc64-solaris ~x64-solaris amd64 stable x86 stable arm stable Stable for HPPA PPC64. Stable on alpha. ppc stable Stabilization of higher version happening in bug 588138 CVE-2016-1546 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1546): The Apache HTTP Server 2.4.17 and 2.4.18, when mod_http2 is enabled, does not limit the number of simultaneous stream workers for a single HTTP/2 connection, which allows remote attackers to cause a denial of service (stream-processing outage) via modified flow-control windows. Added to existing GLSA. This issue was resolved and addressed in GLSA 201610-02 at https://security.gentoo.org/glsa/201610-02 by GLSA coordinator Kristian Fiskerstrand (K_F). |
From ${URL} : A vulnerability was found in httpd. By manipulating the flow control windows on streams, a client was able to block server threads for long times, causing starvation of worker threads. Connections could still be opened, but no streams where processed for these. This issue affected HTTP/2 support in 2.4.17 and 2.4.18. External references: http://httpd.apache.org/security/vulnerabilities_24.html @maintainer(s): since the fixed package is already in the tree, please let us know if it is ready for the stabilization or not.