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CVE-2011-0520

Published: Jan 28, 2011Updated: Apr 29, 2026 Sources: CVE List NVDCWE-119
NVD MITRE
7.5CVSSHIGH
EPSS Score
5.2%
Top 8.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LAu:NC:PI:PA:P
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Au:NAuthentication
None
Impact
C:PConfidentiality
Partial
I:PIntegrity
Partial
A:PAvailability
Partial
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Weaknesses

CWE-119

Affected Products

maradnsmaradns
On-prem
Networking Infrastructure / dns-dhcp-ntp
n/an/a
maradnsoss-projectNetworking Infrastructureaka maradns

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=610834
bugs.debian.org
http://osvdb.org/70630
osvdb.org
http://secunia.com/advisories/43027
secunia.com
and 7 more references View all →

Timeline

Published
Jan 28, 2011
Last Updated
Apr 29, 2026

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