CVE-2022-38177

Publication date 21 September 2022

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

By spoofing the target resolver with responses that have a malformed ECDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.

Read the notes from the security team

Status

Package Ubuntu Release Status
bind9 22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
20.04 LTS focal
Fixed 1:9.16.1-0ubuntu2.11
18.04 LTS bionic
Fixed 1:9.11.3+dfsg-1ubuntu1.18
16.04 LTS xenial
Fixed 1:9.10.3.dfsg.P4-8ubuntu1.19+esm3
14.04 LTS trusty
Fixed 1:9.9.5.dfsg-3ubuntu0.19+esm7
isc-dhcp 22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

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Notes

alexmurray

As of isc-dhcp-4.4.3-1, isc-dhcp vendors bind9 libs

mdeslaur

affects 9.8.4 -> 9.16.32

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-5626-1
    • Bind vulnerabilities
    • 21 September 2022
    • USN-5626-2
    • Bind vulnerabilities
    • 21 September 2022

Other references