syslog-ng macro expansion buffer overflow
| syslogng-macro-expansion-bo (10339) |  High Risk |
Description:
syslog-ng is vulnerable to a buffer overflow, caused by improper bounds checking when performing macro expansion. By creating a destination template file name containing a macro with an overly long "left" variable appended with a constant character, a remote attacker could overflow a buffer and execute arbitrary code on the system, once the macro is expanded.
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of syslog-ng (1.5.21 (devel) or later) or (1.4.16 (stable) or later), available from the BalaBit IT Ltd. Web site. See References.
—OR&mdash&
Apply the patch for this vulnerability, as listed in the BugTraq Mailing List posting dated Thu Oct 10 2002 - 07:44:00 CDT. See References.
For Debian GNU/Linux:
Upgrade to the latest syslog-ng package, as listed below. Refer to DSA-175-1 for more information. See References.
Debian GNU/Linux 2.2 (potato): 1.4.0rc3-3.2 or later
Debian GNU/Linux 3.0 (woody): 1.5.15-1.1 or later
For EnGarde Secure Linux Community Edition:
Upgrade to the latest version of syslog-ng (1.4.10-1.0.26 or later), as listed in EnGarde Secure Linux Security Advisory ESA-20021029-028. See References.
For SuSE Linux:
Upgrade to the latest syslog-ng package, as listed below. Refer to SuSE Security Announcement SuSE-SA:2002:039 for more information. See References.
SuSE Linux 8.1 (Intel): 1.4.14-321 or later
SuSE Linux 8.0 (Intel): 1.4.14-319 or later
SuSE Linux 7.3 (Intel): 1.4.12-72 or later
SuSE Linux 7.3 (Sparc): 1.4.12-30 or later
SuSE Linux 7.3 (PPC): 1.4.12-57 or later
SuSE Linux 7.2 (Intel): 1.4.11-89 or later
SuSE Linux 7.1 (AIX): 1.4.11-26 or later
SuSE Linux 7.1 (PPC): 1.4.11-30 or later
For Conectiva Linux:
Upgrade to the latest syslog-ng package, as listed below. Refer to Conectiva Linux Security Announcement CLA-2002:547 for more information. See References.
Conectiva Linux 8.0: 1.4.14-3U80_1cl or later
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- BalaBit IT Ltd. Security Advisory ZSA-2002-014: Syslog-ng.
- BalaBit IT Ltd. Web site: Syslog-ng.
- BugTraq Mailing List, Thu Oct 10 2002 - 07:44:00 CDT : syslog-ng buffer overflow.
- Conectiva Linux Announcement CLSA-2002:547: syslog-ng.
- EnGarde Secure Linux Security Advisory ESA-20021029-028: buffer overflow in macro handling code (UPDATED).
- BID-5934: Syslog-ng Macro Expansion Remote Buffer Overflow Vulnerability
- CVE-2002-1200: Balabit Syslog-NG 1.4.x before 1.4.15, and 1.5.x before 1.5.20, when using template filenames or output, does not properly track the size of a buffer when constant characters are encountered during macro expansion, which allows remote attackers to cause a denial of service and possibly execute arbitrary code.
- DSA-175: syslog-ng -- buffer overflow
- OSVDB ID: 14508: Balabit Syslog-NG Macro Expansion Overflow
Platforms Affected:
- BalaBit syslog-ng 1.4.15 (stable)
- BalaBit syslog-ng 1.5.20 (development)
- Conectiva Linux 8.0
- Debian Debian Linux 2.2
- Debian Debian Linux 3.0
- EngardeLinux Secure Linux
- EngardeLinux Secure Professional
- SuSE SuSE eMail Server 3.1
- SuSE SuSE eMail Server III
- SUSE SuSE Linux 7.1
- SUSE SuSE Linux 7.2
- SUSE SuSE Linux 7.3
- SUSE SuSE Linux 8.0
- SUSE SuSE Linux 8.1
- SuSE SuSE Linux Firewall
Reported:
Oct 10, 2002
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