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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/

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About:
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vulnerabilities.

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