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TITLE:
syslog-ng PCRE Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA44527

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/44527/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=44527

RELEASE DATE:
2011-05-12

DISCUSS ADVISORY:
http://secunia.com/advisories/44527/#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/44527/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
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https://ca.secunia.com/?page=viewadvisory&vuln_id=44527

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 syslog-ng, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error when handling certain
regular expressions in combination with the "global" flag, which can
be exploited to trigger an infinite loop and cause high CPU and
memory consumption.

Note: This may only be a problem when using certain PCRE versions
(e.g. version 8.12).

SOLUTION:
Update to version 3.2.4.

PROVIDED AND/OR DISCOVERED BY:
Micah Anderson

ORIGINAL ADVISORY:
https://lists.balabit.hu/pipermail/syslog-ng/2011-April/016444.html
https://lists.balabit.hu/pipermail/syslog-ng/2011-May/016576.html

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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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.

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