Vulnerability CVE-2011-0520
Published: 2011-01-28   Modified: 2012-02-13

Description:
The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and probably other versions allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a long DNS hostname with a large number of labels, which triggers a heap-based buffer overflow.

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Maradns -> Maradns 

 References:
http://xforce.iss.net/xforce/xfdb/64885
http://www.vupen.com/english/advisories/2011/0699
http://www.securityfocus.com/bid/45966
http://www.openwall.com/lists/oss-security/2011/01/24/6
http://www.openwall.com/lists/oss-security/2011/01/24/1
http://www.debian.org/security/2011/dsa-2196
http://secunia.com/advisories/43107
http://secunia.com/advisories/43027
http://osvdb.org/70630
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=610834
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