----------------------------------------------------------------------

Secunia customers receive relevant and filtered advisories.
Delivery is done via different channels including SMS, Email, Web,
and https based XML feed.
http://corporate.secunia.com/trial/38/request/

----------------------------------------------------------------------

TITLE:
lighttpd "mtime" and "\r\n\r\n\" Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA24886

VERIFY ADVISORY:
http://secunia.com/advisories/24886/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
lighttpd 1.x
http://secunia.com/product/4661/

DESCRIPTION:
Some vulnerabilities have been reported in lighttpd, which can be
exploited by malicious users and malicious people to cause a DoS
(Denial of Service).

1) An error exists during the parsing of the "\r\n\r\n" sequence.
This can be exploited to cause an infinite loop by aborting the
connection while the server parses the sequence, which e.g. results
in a high CPU load and exhaustion of system resources .

2) An NULL pointer dereference exists within the mtime handling of
files. This can be exploited to cause a crash by requesting a file
with mtime 0.

Successful exploitation requires that the attacker can request or
upload files with mtime 0, or can otherwise modify the mtime of
files.

Vulnerability #1 is reported in version 1.4.12 and 1.4.13.
Vulnerability #2 is reported in the 1.4.x branch and probably also
affects the 1.3.x branch. Other versions may also be affected.

SOLUTION:
Update to version 1.4.15 or apply patches.

http://www.lighttpd.net/assets/2007/4/13/lighttpd-1.4.x_crlf_parsing_dos.patch
http://www.lighttpd.net/assets/2007/4/13/lighttpd-1.4.x_zero_mtime_crash.patch

PROVIDED AND/OR DISCOVERED BY:
1) Robert Jakabosky
2) cubiq

ORIGINAL ADVISORY:
http://www.lighttpd.net/assets/2007/4/13/lighttpd_sa2007_01.txt
http://www.lighttpd.net/assets/2007/4/13/lighttpd_sa2007_02.txt

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org

----------------------------------------------------------------------