CVE-2011-4869
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.99%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.
- CVSS 2.0
- 7.8 HIGHAV:N/AC:L/Au:N/C:N/I:N/A:C
- EPSS
- 2.99% probability · 87th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-399
- Affected
- unbound/unbound
- Source
- cve@mitre.org
References
- http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html
- http://osvdb.org/77910
- http://secunia.com/advisories/47326
- http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txtPatch, Vendor Advisory
- http://www.debian.org/security/2011/dsa-2370
- http://www.kb.cert.org/vuls/id/209659Patch, US Government Resource
- https://exchange.xforce.ibmcloud.com/vulnerabilities/71868
- http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html
- http://osvdb.org/77910
- http://secunia.com/advisories/47326
- http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txtPatch, Vendor Advisory
- http://www.debian.org/security/2011/dsa-2370
- http://www.kb.cert.org/vuls/id/209659Patch, US Government Resource
- https://exchange.xforce.ibmcloud.com/vulnerabilities/71868
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.