Bug 703011 (CVE-2011-1770) - CVE-2011-1770 kernel: dccp: handle invalid feature options length
Summary: CVE-2011-1770 kernel: dccp: handle invalid feature options length
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2011-1770
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 703012 703013 703014
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-05-09 01:37 UTC by Eugene Teo (Security Response)
Modified: 2023-05-11 17:28 UTC (History)
17 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-07-29 12:44:50 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0836 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2011-06-01 19:56:53 UTC
Red Hat Product Errata RHSA-2011:1253 0 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2011-09-12 19:43:48 UTC

Description Eugene Teo (Security Response) 2011-05-09 01:37:33 UTC 
length of zero (after subtracting two for the type and len fields) for the DCCPO_{CHANGE,CONFIRM}_{L,R} options will cause an underflow due to the subtraction.  The subsequent code may read past the end of the options value buffer when parsing.

http://marc.info/?l=linux-kernel&m=130468845209036&w=2

Acknowledgements:

Red Hat would like to thank Dan Rosenberg for reporting this issue.
Comment 3 Eugene Teo (Security Response) 2011-05-09 02:05:29 UTC 
Statement:

This issue does not affect Red Hat Enterprise Linux 4 and 5: Red Hat Enterprise Linux 4 does not provide support for the Datagram Congestion Control Protocol (DCCP), and Red Hat Enterprise Linux 5, which does support DCCP, did not backport the upstream commit that introduced this issue, e77b8363b. This has been addressed in Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-0836.html and https://rhn.redhat.com/errata/RHSA-2011-1253.html.
Comment 4 errata-xmlrpc 2011-06-01 19:57:04 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0836 https://rhn.redhat.com/errata/RHSA-2011-0836.html
Comment 5 Eugene Teo (Security Response) 2011-06-28 07:20:18 UTC 
Upstream commit:
http://git.kernel.org/linus/a294865978b701e4d0d90135672749531b9a900d
Comment 6 errata-xmlrpc 2011-09-12 19:44:28 UTC 
This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2011:1253 https://rhn.redhat.com/errata/RHSA-2011-1253.html
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