CVE-2022-2795

Publication date 21 September 2022

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.3 · Medium

Score breakdown

By flooding the target resolver with queries exploiting this flaw an attacker can significantly impair the resolver's performance, effectively denying legitimate clients access to the DNS resolution service.

Read the notes from the security team

Status

Package Ubuntu Release Status
bind9 24.10 oracular
Fixed 1:9.18.4-2ubuntu2
24.04 LTS noble
Fixed 1:9.18.4-2ubuntu2
23.10 mantic
Fixed 1:9.18.4-2ubuntu2
23.04 lunar
Fixed 1:9.18.4-2ubuntu2
22.10 kinetic
Fixed 1:9.18.4-2ubuntu2
22.04 LTS jammy
Fixed 1:9.18.1-1ubuntu1.2
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
14.04 LTS trusty
bind9-libs 24.10 oracular Not in release
24.04 LTS noble Not in release
23.10 mantic Not in release
22.04 LTS jammy
Needs evaluation
20.04 LTS focal
Needs evaluation
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
isc-dhcp 24.10 oracular
Vulnerable
24.04 LTS noble
Vulnerable
23.10 mantic Ignored end of life, was needed
23.04 lunar Ignored end of life, was needed
22.10 kinetic Ignored end of life, was needed
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

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro

Notes

alexmurray

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

mdeslaur

This is unlikely to affect isc-dhcp's use of bind9-libs and the vendored bind9 libs, marking as negligible

Patch details

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

Package Patch details
bind9

Severity score breakdown

Parameter Value
Base score 5.3 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

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

Other references