TI-2011-00447 Aliases CVE-2011-0520 GHSA-7vq7-qcwq-j3vc

The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and…

MEDIUM 41CWE-119Published 2011-01-28 · Updated 2024-08-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: — Not recorded in CVSS 2.0
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: Partial · Partial · Partial
Fix status: No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.05169 92nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:maradns:maradns:1.4.03:::::::*	1.4.03	Vulnerable	MaraDNS
cpe:2.3:a:maradns:maradns:1.4.05:::::::*	1.4.05	Vulnerable	MaraDNS

cpe:2.3:a:maradns:maradns:1.4.03:*:*:*:*:*:*:* Versions 1.4.03 Vulnerable ·MaraDNS
cpe:2.3:a:maradns:maradns:1.4.05:*:*:*:*:*:*:* Versions 1.4.05 Vulnerable ·MaraDNS

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2011-0520
2026-10-03 Alias added: GHSA-7vq7-qcwq-j3vc

References

Advisory 1

DSA-2196

Other 5

TI-2023-14847 MaraDNS Integer Underflow Vulnerability in DNS Packet Decompression CVSS 3.1HIGH 7.5
TI-2022-12502 An issue was discovered in MaraDNS Deadwood through 3.5.0021 that allows variant V1 of… CVSS 3.1HIGH 7.5
TI-2012-00024 MaraDNS before 1.3.07.12 and 1.4.x before 1.4.08 computes hash values for DNS data… CVSS 2.0HIGH 7.8
TI-2007-03013 Multiple memory leaks in server/MaraDNS.c in MaraDNS before 1.2.12.06, and 1.3.x before… CVSS 2.0HIGH 7.8
TI-2004-00727 Multiple implementations of the DNS protocol, including (1) Poslib 1.0.2-1 and earlier as… CVSS 2.0MEDIUM 5.0
TI-2008-00052 MaraDNS 1.0 before 1.0.41, 1.2 before 1.2.12.08, and 1.3 before 1.3.07.04 allows remote… CVSS 2.0MEDIUM 5.0

See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences