ALPINE-CVE-2023-50868 PUBLISHED CVSS 7.5 HIGH

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.

Risk Scores

CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products

VendorProductVersions
Alpine:v3.17bind9.10.2, 9.10.2, 9.10.2
Alpine:v3.21bind9.9.4_p1-r1, 9.10.0-r0, 9.10.0_p1-r0
Alpine:v3.18unbound1.4.10-r3, 1.17.1-r1, 1.17.0-r1
Alpine:v3.20bind9.10.3_p3-r1, 9.10.3_p4-r0, 9.10.3_p4-r1
Alpine:v3.21unbound1.13.0-r0, 0, 1.10.0-r0
Alpine:v3.23dnsmasq2.89-r6, 2.86-r0, 2.86-r1
Alpine:v3.23unbound1.4.13-r0, 1.5.4-r0, 1.6.6-r0
Alpine:v3.17dnsmasq0, 2.86-r0, 2.86-r1
Alpine:v3.20dnsmasq0, 2.89-r6, 2.89-r5
Alpine:v3.19dnsmasq2.89-r1, 2.86-r2, 2.86-r1
Alpine:v3.23bind9.7.2_p2-r0, 0, 9.10.0_p2-r0
Alpine:v3.16bind9.10.1-r2, 9.7.0, 9.7.1-r0
Alpine:v3.21dnsmasq2.86-r1, 2.86-r3, 2.86-r4
Alpine:v3.17unbound1.6.0-r1, 0, 1.10.0-r0
Alpine:v3.19bind*, 9.9.4_p2-r0, 9.9.4_p1-r1
Alpine:v3.22dnsmasq2.89-r6, 2.89-r5, 2.89-r4
Alpine:v3.22bind9.9.2-r0, 9.9.1_p2-r0, 9.9.1_p3-r0
Alpine:v3.20unbound1.7.0-r1, 1.7.0-r2, 1.7.1-r0
Alpine:v3.22unbound1.9.5-r0, 1.9.4-r1, 1.9.4-r0
Alpine:v3.19unbound1.16.0-r1, 1.4.13-r3, 1.4.22-r1

…and 2 more

Timeline

References

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