Bug 922039 (CVE-2012-6536) - CVE-2012-6536 Kernel: xfrm_user: ensure user supplied esn replay window is valid
Summary: CVE-2012-6536 Kernel: xfrm_user: ensure user supplied esn replay window is valid
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2012-6536
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 858947
TreeView+ depends on / blocked
 
Reported: 2013-03-15 12:56 UTC by Prasad Pandit
Modified: 2021-02-17 07:55 UTC (History)
24 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-06-09 18:15:12 UTC
Embargoed:

Attachments (Terms of Use)

Description Prasad Pandit 2013-03-15 12:56:37 UTC 
Linux kernel built with XFRM framework support is vulnerable to a memory
leakage flaw. It occurs when a user creates a new state or updates an
existing one but does not supply the bytes for the whole ESN replay window
and the kernel copies heap bytes into the replay bitmap follow the
XFRMA_REPLAY_ESN_VAL netlink attribute.

A privileged(CAP_NET_ADMIN) user could use this flaw to leak up to ~3.5kB of
kernel heap memory.

Upstream fix
-------------
 -> https://git.kernel.org/linus/ecd7918745234e423dd87fcc0c077da557909720

Reference:
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 -> http://www.openwall.com/lists/oss-security/2013/03/14/21
Comment 1 Prasad Pandit 2013-03-15 13:00:00 UTC 
Statement:

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.
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