CVE-2020-22217

Publication date 22 August 2023

Last updated 21 October 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.9 · Medium

Score breakdown

Description

Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in ares_parse_soa_reply.c.

Why is this CVE medium priority?

Only an out-of-bounds read, so denial of service only

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
c-ares 26.10 stonking
Not affected
26.04 LTS resolute
Not affected
25.10 questing
Not affected
25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.04 LTS jammy
Not affected
20.04 LTS focal
Fixed in 1.15.0-1ubuntu0.4
18.04 LTS bionic
Fixed in 1.14.0-1ubuntu0.2+esm3
16.04 LTS xenial
Fixed in 1.10.0-3ubuntu0.2+esm4
14.04 LTS trusty Ignored end of standard support

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
c-ares

Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.9 · Medium

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-6376-1
    • c-ares vulnerability
    • 18 September 2023
    • USN-8951-1
    • c-ares vulnerabilities
    • 21 October 2026

Other references

Access our resources on patching vulnerabilities