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CVE-2023-5981

Publication date 17 November 2023

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.9 · Medium

Score breakdown

A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding.

Read the notes from the security team

Status

Package Ubuntu Release Status
gnutls28 23.10 mantic
Fixed 3.8.1-4ubuntu1.1
23.04 lunar
Fixed 3.7.8-5ubuntu1.1
22.04 LTS jammy
Fixed 3.7.3-4ubuntu1.3
20.04 LTS focal
Fixed 3.6.13-2ubuntu1.9
18.04 LTS bionic
16.04 LTS xenial Ignored change too intrusive
14.04 LTS trusty Ignored end of standard support

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Notes

ccdm94

in order to backport the patch for this CVE for xenial and earlier it is necessary to also include the changes from commit 4804febdd, which is also the fix for CVE-2018-16868, due to the use of function 'gnutls_privkey_decrypt_data2' in the patch. However, to successfully add the fix for CVE-2018-16868 it is required that the patch for CVE-2018-16869 also be applied to nettle, which is not possible for xenial and earlier due to it being too intrusive. Therefore, it will not be possible to patch CVE-2023-5981 in xenial and earlier because it would also be considered too intrusive in this case.

Patch details

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

Package Patch details
gnutls28

Severity score breakdown

Parameter Value
Base score 5.9 · Medium
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

Other references