Multiple race conditions in suexec in Apache HTTP Server (httpd) 2.2.3 between directory and file validation, and their usage, allow local users to gain privileges and execute arbitrary code by renaming directories or performing symlink attacks. NOTE: the researcher, who is reliable, claims that the vendor disputes the issue because "the attacks described rely on an insecure server configuration" in which the user "has write access to the document root."
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
| Link | Tags |
|---|---|
| http://osvdb.org/38639 | vdb entry |
| http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=511 | third party advisory vendor advisory |
| http://marc.info/?l=apache-httpd-dev&m=117511834512138&w=2 | mailing list |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/33584 | vdb entry |
| http://www.securitytracker.com/id?1017904 | vdb entry |
| http://www.securityfocus.com/bid/23438 | vdb entry |
| http://marc.info/?l=apache-httpd-dev&m=117511568709063&w=2 | vendor advisory mailing list |