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>> Syslog-ng Incoming Timestamps Handling Denial of Service Vulnerability

Title : Syslog-ng Incoming Timestamps Handling Denial of Service Vulnerability
VUPEN ID : VUPEN/ADV-2007-4257
CVE ID : CVE-2007-6437
CWE ID : VUPEN VNS Only
CVSS V2 : VUPEN VNS Only
Rated as : Low Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2007-12-19


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format 

A vulnerability has been identified in Syslog-ng, which could be exploited by attackers to cause a denial of service. This issue is caused by a NULL pointer dereference error in the "log_msg_parse()" [src/logmsg.c] function when processing incoming messages with a timestamp that does not contain a terminating space character, which could be exploited by remote attackers to crash a vulnerable application, creating a denial of service condition.

Affected Products

Syslog-ng versions prior to 2.0.6
Syslog-ng Premium Edition versions prior to 2.1.8

Solution

Upgrade to Syslog-ng version 2.0.6 :
http://www.balabit.com/downloads/files/syslog-ng/sources/2.0/src/

Upgrade to Syslog-ng Premium Edition version 2.1.8 :
http://www.balabit.com/downloads/files/syslog-ng/binaries/premium-edition/

References

http://www.vupen.com/english/advisories/2007/4257
http://git.balabit.hu/?p=bazsi/syslog-ng-2.0.git;a=commitdiff;h=3126ebad217e7fd6356f4733ca33f571aa87a170

Credits

Vulnerability reported by Oriol Carreras.

ChangeLog

2007-12-19 : Initial release

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