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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.98% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 87.1% of scored records. A rank, not a probability.
- NVD base score
- The NVD has published no score for this record
- NVD CVSS vector
- No NVD score to derive
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-16.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2011-12-20 11:00Z14 YR AGO
- Last updated
- 2024-08-07 00:16Z2 YR AGO
- Reserved
- 2011-12-20
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- a35c4f8c63cd4b64dce3704204f97dec3efaa5a81929adabb733ce317accc82b
05 Affected products
06 References
- unbound.nlnetlabs.nlhttp://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt
- secunia.com47326http://secunia.com/advisories/47326
- www.kb.cert.orgVU#209659http://www.kb.cert.org/vuls/id/209659
- exchange.xforce.ibmcloud.comunbound-nsec3-dos(71868)https://exchange.xforce.ibmcloud.com/vulnerabilities/71868
- www.debian.orgDSA-2370http://www.debian.org/security/2011/dsa-2370
- lists.fedoraproject.orgFEDORA-2011-17337http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html
- lists.fedoraproject.orgFEDORA-2011-17282http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html
- osvdb.org77910http://osvdb.org/77910
07 Fixed in
Debian 12
- unbound Fixed in 1.4.14-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- unbound Fixed in 1.4.14-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- unbound Fixed in 1.4.14-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.