Synopsis: Solaris syslogd is vulnerable to a remote buffer overflow. Versions: Solaris 2.6 SPARC: Not vulnerable Solaris 2.7 SPARC/x86: Untested Solaris 8 SPARC: Vulnerable Solaris 8 x86: Vulnerable Solaris 9 SPARC: Not vulnerable Solaris 9 x86: Untested Impact: Low-Medium. While I've not been able to craft an exploit that successfully executes arbitrary code, it may still be possible. If not, this can be used to hide evidence of attack or intrusion in environments where a central logging server is used. Description: In Solaris 8, syslogd dumps core when receiving a UDP packet larger than 1024 bytes, instead of truncating it, as dictated by RFC3164, section 6.1. Fix: Sun Microsystems released patch 110945-08 for SPARC and 110946 for x86, which resolves this problem (identified as bug #4812764) on 2003-05-29. Obviously, any systems not using syslogd to log from remote hosts should be run with the -t flag. Alternatively, consider switching to a more reliable logging system, such as Gerrit Pape's socklog. Timeline: 2003-01-18: Problem discovered, platforms tested. 2003-01-21: Sun Security Coordination Team notified. 2003-02-04: Sun confirms the problem and assigns bug ID. 2003-05-29: Patch released. References: http://sunsolve.sun.com/pub-cgi/findPatch.pl?patchId=110945&rev=08 If anyone else is able to do anything more interesting with this bug, I'd like to hear about it. Cheers, lx
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