Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-35329.json
JSON Data
https://api.test.osv.dev/v1/vulns/AZL-35329
Upstream
Published
2024-02-14T16:15:45Z
Modified
2026-04-01T05:12:55.542828Z
Summary
CVE-2023-50868 affecting package unbound for versions less than 1.19.1-1
Details

The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.

References

Affected packages

Azure Linux:3 / unbound

Package

Name
unbound
Purl
pkg:rpm/azure-linux/unbound

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.19.1-1

Database specific

source
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-35329.json"