CVE-2023-50868 Affecting dnsmasq-utils package, versions <0:2.79-31.el8_9.2


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.05% (21st percentile)

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  • Snyk IDSNYK-ALMALINUX8-DNSMASQUTILS-6457513
  • published19 Mar 2024
  • disclosed30 Apr 2024

Introduced: 19 Mar 2024

CVE-2023-50868  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 dnsmasq-utils to version 0:2.79-31.el8_9.2 or higher.
This issue was patched in ALSA-2024:1335.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dnsmasq-utils package and not the dnsmasq-utils package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

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

CVSS Base Scores

version 3.1