Bug 1314288 - (CVE-2012-6701) CVE-2012-6701 kernel: AIO interface didn't use rw_verify_area() for checking mandatory locking on files and size of access
CVE-2012-6701 kernel: AIO interface didn't use rw_verify_area() for checking ...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20120521,repor...
: Security
Depends On: 1337535
Blocks: 1314289
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Reported: 2016-03-03 05:28 EST by Adam Mariš
Modified: 2016-10-04 00:17 EDT (History)
34 users (show)

See Also:
Fixed In Version: kernel 3.5-rc1
Doc Type: Bug Fix
Doc Text:
It was found that AIO interface didn't use the proper rw_verify_area() helper function with extended functionality, for example, mandatory locking on the file. Also rw_verify_area() makes extended checks, for example, that the size of the access doesn't cause overflow of the provided offset limits. This integer overflow in fs/aio.c in the Linux kernel before 3.4.1 allows local users to cause a denial of service or possibly have unspecified other impact via a large AIO iovec.
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Description Adam Mariš 2016-03-03 05:28:41 EST
It was found that AIO interface didn't use the proper rw_verify_area() helper function with extended functionality, for example, mandatory locking on the file. Also rw_verify_area() makes extended checks, for example, that the size of the access doesn't cause overflow of the provided offset limits. This integer overflow in fs/aio.c in the Linux kernel before 3.4.1 allows local users to cause a denial of service or possibly have unspecified other impact via a large AIO iovec.

Upstream patch:

https://git.kernel.org/linus/a70b52ec1aaeaf60f4739edb1b422827cb6f3893

CVE-ID request and assignment:

http://seclists.org/oss-sec/2016/q1/466

http://seclists.org/oss-sec/2016/q1/491
Comment 2 Vladis Dronov 2016-05-19 08:26:23 EDT
Statement:

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6. Future Linux kernel updates for the respective releases might address this issue.

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2 as the corresponding fix is already present.

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