medium
4.9
CWE
20
Advisory Published
CVE Published
Updated

CVE-2012-4398: Input Validation

First published: Fri Aug 31 2012(Updated: )

As Tetsuo Handa pointed out, request_module() can stress the system while the oom-killed caller sleeps in TASK_UNINTERRUPTIBLE. The task T uses "almost all" memory, then it does something which triggers request_module(). Say, it can simply call sys_socket(). This in turn needs more memory and leads to OOM. oom-killer correctly chooses T and kills it, but this can't help because it sleeps in TASK_UNINTERRUPTIBLE and after that oom-killer becomes "disabled" by the TIF_MEMDIE task T. A local unprivileged user can make the system unusable. Upstream fixes: (1) 70834d30 "usermodehelper: use UMH_WAIT_PROC consistently" (2) b3449922 "usermodehelper: introduce umh_complete(sub_info)" (3) d0bd587a "usermodehelper: implement UMH_KILLABLE" (4) 9d944ef3 "usermodehelper: kill umh_wait, renumber UMH_* constants" (5) 5b9bd473 "usermodehelper: ____call_usermodehelper() doesn't need do_exit()" (6) 3e63a93b "kmod: introduce call_modprobe() helper" (7) 1cc684ab "kmod: make __request_module() killable" According to the reporter, (1) and (4) are optional and safer to exclude. References: <a href="https://bugs.launchpad.net/ubuntu/+source/linux/+bug/963685">https://bugs.launchpad.net/ubuntu/+source/linux/+bug/963685</a> Acknowledgements: Red Hat would like to thank Tetsuo Handa for reporting this issue.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<=3.4
Linux Linux kernel=3.0-rc1
Linux Linux kernel=3.0-rc2
Linux Linux kernel=3.0-rc3
Linux Linux kernel=3.0-rc4
Linux Linux kernel=3.0-rc5
Linux Linux kernel=3.0-rc6
Linux Linux kernel=3.0-rc7
Linux Linux kernel=3.0.1
Linux Linux kernel=3.0.2
Linux Linux kernel=3.0.3
Linux Linux kernel=3.0.4
Linux Linux kernel=3.0.5
Linux Linux kernel=3.0.6
Linux Linux kernel=3.0.7
Linux Linux kernel=3.0.8
Linux Linux kernel=3.0.9
Linux Linux kernel=3.0.10
Linux Linux kernel=3.0.11
Linux Linux kernel=3.0.12
Linux Linux kernel=3.0.13
Linux Linux kernel=3.0.14
Linux Linux kernel=3.0.15
Linux Linux kernel=3.0.16
Linux Linux kernel=3.0.17
Linux Linux kernel=3.0.18
Linux Linux kernel=3.0.19
Linux Linux kernel=3.0.20
Linux Linux kernel=3.0.21
Linux Linux kernel=3.0.22
Linux Linux kernel=3.0.23
Linux Linux kernel=3.0.24
Linux Linux kernel=3.0.25
Linux Linux kernel=3.0.26
Linux Linux kernel=3.0.27
Linux Linux kernel=3.0.28
Linux Linux kernel=3.0.29
Linux Linux kernel=3.0.30
Linux Linux kernel=3.0.31
Linux Linux kernel=3.0.32
Linux Linux kernel=3.0.33
Linux Linux kernel=3.0.34
Linux Linux kernel=3.0.35
Linux Linux kernel=3.0.36
Linux Linux kernel=3.0.37
Linux Linux kernel=3.0.38
Linux Linux kernel=3.0.39
Linux Linux kernel=3.0.40
Linux Linux kernel=3.0.41
Linux Linux kernel=3.0.42
Linux Linux kernel=3.0.43
Linux Linux kernel=3.0.44
Linux Linux kernel=3.1
Linux Linux kernel=3.1-rc1
Linux Linux kernel=3.1-rc2
Linux Linux kernel=3.1-rc3
Linux Linux kernel=3.1-rc4
Linux Linux kernel=3.1.1
Linux Linux kernel=3.1.2
Linux Linux kernel=3.1.3
Linux Linux kernel=3.1.4
Linux Linux kernel=3.1.5
Linux Linux kernel=3.1.6
Linux Linux kernel=3.1.7
Linux Linux kernel=3.1.8
Linux Linux kernel=3.1.9
Linux Linux kernel=3.1.10
Linux Linux kernel=3.2
Linux Linux kernel=3.2-rc2
Linux Linux kernel=3.2-rc3
Linux Linux kernel=3.2-rc4
Linux Linux kernel=3.2-rc5
Linux Linux kernel=3.2-rc6
Linux Linux kernel=3.2-rc7
Linux Linux kernel=3.2.1
Linux Linux kernel=3.2.2
Linux Linux kernel=3.2.3
Linux Linux kernel=3.2.4
Linux Linux kernel=3.2.5
Linux Linux kernel=3.2.6
Linux Linux kernel=3.2.7
Linux Linux kernel=3.2.8
Linux Linux kernel=3.2.9
Linux Linux kernel=3.2.10
Linux Linux kernel=3.2.11
Linux Linux kernel=3.2.12
Linux Linux kernel=3.2.13
Linux Linux kernel=3.2.14
Linux Linux kernel=3.2.15
Linux Linux kernel=3.2.16
Linux Linux kernel=3.2.17
Linux Linux kernel=3.2.18
Linux Linux kernel=3.2.19
Linux Linux kernel=3.2.20
Linux Linux kernel=3.2.21
Linux Linux kernel=3.2.22
Linux Linux kernel=3.2.23
Linux Linux kernel=3.2.24
Linux Linux kernel=3.2.25
Linux Linux kernel=3.2.26
Linux Linux kernel=3.2.27
Linux Linux kernel=3.2.28
Linux Linux kernel=3.2.29
Linux Linux kernel=3.2.30
Linux Linux kernel=3.3
Linux Linux kernel=3.3-rc1
Linux Linux kernel=3.3-rc2
Linux Linux kernel=3.3-rc3
Linux Linux kernel=3.3-rc4
Linux Linux kernel=3.3-rc5
Linux Linux kernel=3.3-rc6
Linux Linux kernel=3.3-rc7
Linux Linux kernel=3.3.1
Linux Linux kernel=3.3.2
Linux Linux kernel=3.3.3
Linux Linux kernel=3.3.4
Linux Linux kernel=3.3.5
Linux Linux kernel=3.3.6
Linux Linux kernel=3.3.7
Linux Linux kernel=3.3.8
Linux Linux kernel=3.4-rc1
Linux Linux kernel=3.4-rc2
Linux Linux kernel=3.4-rc3
Linux Linux kernel=3.4-rc4
Linux Linux kernel=3.4-rc5
Linux Linux kernel=3.4-rc6
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.112-1
6.11.7-1
6.11.9-1

Remedy

http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.4.tar.bz2

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