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Vulnerability Summary for CVE-2011-0520

Original release date: 01/28/2011
Last revised: 04/08/2011


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.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 7.5 (HIGH) (AV:N/AC:L/Au:N/C:P/I:P/A:P) (legend)
Impact Subscore: 6.4
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

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External Source: DEBIAN
Name: DSA-2196
External Source: MLIST
Name: [oss-security] 20110124 Re: CVE request: MaraDNS DoS via long queries
External Source: VUPEN
Name: ADV-2011-0699
External Source: SECUNIA
Name: 43107
External Source: SECUNIA
Name: 43027
Type: Advisory
External Source: BID
Name: 45966
External Source: XF
Name: maradns-compressadddlabelpoints-bo(64885)
External Source: CONFIRM
Name: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=610834
External Source: MLIST
Name: [oss-security] 20110123 CVE request: MaraDNS DoS via long queries
External Source: OSVDB
Name: 70630

Vulnerable software and versions

+ Configuration 1
+ OR
* cpe:/a:maradns:maradns:1.4.03
* cpe:/a:maradns:maradns:1.4.05

* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)