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CVE-2011-0520

UnknownEPSS 5.17%

Last modified

CVE-2011-0520 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 5.17% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
5.17%

91.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MaradnsMaradns1.4.03
MaradnsMaradns1.4.05

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2011-0520?
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.
How severe is CVE-2011-0520?
Severity scoring for CVE-2011-0520 is pending analysis. The EPSS model estimates a 5.17% probability of exploitation in the next 30 days.
How do I fix CVE-2011-0520?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-0520?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST