CVE-2016-6323
Published: 7 October 2016
The makecontext function in the GNU C Library (aka glibc or libc6) before 2.25 creates execution contexts incompatible with the unwinder on ARM EABI (32-bit) platforms, which might allow context-dependent attackers to cause a denial of service (hang), as demonstrated by applications compiled using gccgo, related to backtrace generation.
From the Ubuntu Security Team
Andreas Schwab discovered that the GNU C Library on ARM 32-bit platforms did not properly set up execution contexts. An attacker could use this to cause a denial of service.
Notes
| Author | Note |
|---|---|
| sbeattie | debian/patches/git-updates.diff contains the fix in yakkety+ |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
eglibc Launchpad, Ubuntu, Debian |
precise |
Released
(2.15-0ubuntu10.16)
|
| trusty |
Released
(2.19-0ubuntu6.10)
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
Patches: upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=7a609588a02281638e9a0cb57bed18966806349a (2.19 |
||
|
glibc Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(2.24-2)
|
|
| xenial |
Released
(2.23-0ubuntu6)
|
|
| yakkety |
Not vulnerable
(2.24-3ubuntu1)
|
|
| zesty |
Not vulnerable
(2.24-3ubuntu1)
|
|
|
Patches: upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9e2ff6c9cc54c0b4402b8d49e4abe7000fde7617 upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=23446cad92195d8c50092410b4f72ca7f6d1d2f1 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |