CVE catalog
CVE-2011-0520
maradns - buffer overflow
- Severity
- Unknown
- Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 5.17% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | maradns | 11 | 1.4.03-1.1 | fixed |
| Debian | maradns | 5.0 | 1.3.07.09-2 | vulnerable |
| Debian | maradns | 5.0 | 1.3.07.09-2.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | maradns | deb | 11 | 1.4.03-1.1 | Not reported | DEBIAN-CVE-2011-0520 | Not reported |
| Debian | maradns | deb | 5.0 | 1.3.07.09-2.1 | Not reported | DSA-2196-1 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed: