Balabit syslog-ng remote denial of service

balabit-syslog-ng-dos (5576) The risk level is classified as MediumMedium Risk


Balabit is vulnerable to a denial of service attack, due to a vulnerability in the log message parsing function. Syslog-ng is a replacement for syslogd on many Unix platforms. Each log message has a priority label formatted <n>. If the > is left off the priority label, an error occurs in the parsing function. A remote attacker can send a specially-crafted packet containing '<n', followed by a newline character to one of the input channels to cause syslog-ng to crash with a segmentation fault.


Denial of Service


Upgrade to the latest version of syslog-ng (1.49a or later), available from the Balabit Download Page. See References.

For FreeBSD:
Upgrade to the latest version of syslog-ng (1.4.10 or later), as listed in FreeBSD Ports Security Advisory, FreeBSD-SA-01:02. See References.


Platforms Affected:

  • BalaBit Balabit syslog-ng 1.4.8 and prior


Nov 23, 2000

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