Vulnerability CVE-2013-4559
Published: 2013-11-20   Modified: 2013-11-21

Description:
lighttpd before 1.4.33 does not check the return value of the (1) setuid, (2) setgid, or (3) setgroups functions, which might cause lighttpd to run as root if it is restarted and allows remote attackers to gain privileges, as demonstrated by multiple calls to the clone function that cause setuid to fail when the user process limit is reached.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
lighttpd multiple issues (setuid unchecked; FAM read after free)
Stefan Buhler
13.11.2013

CVSS2 => (AV:N/AC:H/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.6/10
10/10
4.9/10
Exploit range
Attack complexity
Authentication
Remote
High
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Lighttpd -> Lighttpd 
Debian -> Debian linux 

 References:
http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2013_02.txt
http://lists.opensuse.org/opensuse-updates/2014-01/msg00049.html
http://marc.info/?l=bugtraq&m=141576815022399&w=2
http://www.openwall.com/lists/oss-security/2013/11/12/4
https://www.debian.org/security/2013/dsa-2795
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