CVE-2011-0520
HIGH · CVSS 7.5EPSS 5.2%EU EUVD
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.
Key facts
- CVSS score
- 7.5 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-119
- EPSS score
- 5.2% (92th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-0540)
- Published
- January 28, 2011
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-0540 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- maradns / maradns
- maradns / maradns
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=610834
- http://osvdb.org/70630
- http://secunia.com/advisories/43027(Vendor Advisory)
- http://secunia.com/advisories/43107
- http://www.debian.org/security/2011/dsa-2196
- http://www.openwall.com/lists/oss-security/2011/01/24/1
- http://www.openwall.com/lists/oss-security/2011/01/24/6
- http://www.securityfocus.com/bid/45966
- http://www.vupen.com/english/advisories/2011/0699
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64885
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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