TITLE: Weex "log_flush()" Format String Vulnerability
SECUNIA ADVISORY ID: SA17028
VERIFY ADVISORY: http://secunia.com/advisories/17028/
CRITICAL: Less critical
IMPACT: DoS, System access
WHERE: >From local network
SOFTWARE: Weex 2.x http://secunia.com/product/5791/
DESCRIPTION: Emanuel Haupt has reported a vulnerability in Weex, which potentially can be exploited by malicious users to cause a DoS (Denial of Service) or to compromise a vulnerable system.
The vulnerability is caused due to a format string error in the "log_flush()" function when flushing an error log entry that contains format string specifiers to disk. This may be exploited to execute arbitrary code on a user's system via a directory name containing format string specifiers.
Successful exploitation requires that the attacker is able to create directories within the user's Weex home directory.
The vulnerability has been reported in version 22.214.171.124. Other versions may also be affected.
SOLUTION: Restrict use to trusted servers only.
PROVIDED AND/OR DISCOVERED BY: Emanuel Haupt
ORIGINAL ADVISORY: http://www.freebsd.org/cgi/query-pr.cgi?pr=ports/86833
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