Bug 782795 (CVE-2012-0050) - CVE-2012-0050 openssl: remote DTLS server DoS introduced in the CVE-2011-4108 fix
Summary: CVE-2012-0050 openssl: remote DTLS server DoS introduced in the CVE-2011-4108...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2012-0050
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: 783122
Blocks: Embargoed771783
TreeView+ depends on / blocked
 
Reported: 2012-01-18 14:12 UTC by Tomas Hoger
Modified: 2021-02-24 13:24 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-02-15 16:24:43 UTC

Attachments (Terms of Use)

Description Tomas Hoger 2012-01-18 14:12:10 UTC 
Quoting upstream advisory:

  http://www.openssl.org/news/secadv_20120118.txt

  A flaw in the fix to CVE-2011-4108 can be exploited in a denial of
  service attack. Only DTLS applications using OpenSSL 1.0.0f and
  0.9.8s are affected.

The fix for CVE-2011-4108 (bug #771770) introduced a regression that can allow remote attacker to crash DTLS servers using affected OpenSSL version because of an out-of-bounds read.  This issue is corrected in OpenSSL 1.0.0g or 0.9.8t.

Upstream fix:
http://cvs.openssl.org/chngview?cn=22032 (0.9.8)
http://cvs.openssl.org/chngview?cn=22037 (1.0.0)
Comment 1 Tomas Hoger 2012-01-19 13:00:53 UTC 
As openssl updates for Red Hat Enterprise Linux addressing CVE-2011-4108 have not been released yet, no released openssl version in Red Hat Enterprise Linux is affected by this flaw.  Future updates will use corrected CVE-2011-4108 fix that does not introduce this problem.

openssl packages versions in Red Hat Enterprise Linux 3 and 4 do not have DTLS support and hence can not be affected by this issue or CVE-2011-4108.

Statement:

Not vulnerable. This issue did not affect the versions of openssl as shipped with Red Hat Enterprise Linux 3, 4, 5, and 6.
Comment 2 Tomas Hoger 2012-01-19 13:01:44 UTC 
Created openssl tracking bugs for this issue

Affects: fedora-all [bug 783122]
Comment 3 Fedora Update System 2012-01-22 05:27:08 UTC 
openssl-1.0.0g-1.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 4 Fedora Update System 2012-01-24 07:55:29 UTC 
openssl-1.0.0g-1.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.
Note You need to log in before you can comment on or make changes to this bug.