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Secunia Security Advisory 45848

Secunia Security Advisory 45848
Posted Sep 3, 2011
Authored by Secunia | Site secunia.com

Secunia Security Advisory - A vulnerability has been reported in rsyslog, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.

tags | advisory, denial of service
SHA-256 | 4e3931273ed32fd1f2f1defe8bca5abdf0042d68a47e040af3ea45e0ad0d81c0

Secunia Security Advisory 45848

Change Mirror Download
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The Secunia CSI 5.0 Beta - now available for testing
Find out more, take a free test drive, and share your opinion with us:
http://secunia.com/blog/242

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TITLE:
rsyslog "parseLegacySyslogMsg()" Malformed TAG Off-By-Two
Vulnerability

SECUNIA ADVISORY ID:
SA45848

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/45848/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=45848

RELEASE DATE:
2011-09-03

DISCUSS ADVISORY:
http://secunia.com/advisories/45848/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)

http://secunia.com/advisories/45848/

ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=45848

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A vulnerability has been reported in rsyslog, which can be exploited
by malicious people to cause a DoS (Denial of Service) and
potentially compromise a vulnerable system.

The vulnerability is caused due to an off-by-two error within the
"parseLegacySyslogMsg()" function (tools/syslogd.c) and can be
exploited to cause a limited stack-based buffer overflow by sending
an overly long TAG within a legacy syslog message.

The vulnerability is reported in versions 4.6.0 through 4.6.7 and
versions 5.2.0 through 5.8.4.

SOLUTION:
Update to versions 4.6.8 or 5.8.5.

Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

PROVIDED AND/OR DISCOVERED BY:
Reported in a Red Hat bug.

ORIGINAL ADVISORY:
rsyslog:
http://www.rsyslog.com/potential-dos-with-malformed-tag/

Red Hat bug 727644:
https://bugzilla.redhat.com/show_bug.cgi?id=727644

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

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