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CVE-2021-44538

Publication date 14 December 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

The olm_session_describe function in Matrix libolm before 3.2.7 is vulnerable to a buffer overflow. The Olm session object represents a cryptographic channel between two parties. Therefore, its state is partially controllable by the remote party of the channel. Attackers can construct a crafted sequence of messages to manipulate the state of the receiver's session in such a way that, for some buffer sizes, a buffer overflow happens on a call to olm_session_describe. Furthermore, safe buffer sizes were undocumented. The overflow content is partially controllable by the attacker and limited to ASCII spaces and digits. The known affected products are Element Web And SchildiChat Web.

Status

Package Ubuntu Release Status
node-matrix-js-sdk 24.10 oracular
Needs evaluation
24.04 LTS noble
Needs evaluation
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.10 kinetic Ignored end of life, was needs-triage
22.04 LTS jammy
Needs evaluation
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.04 LTS focal
Needs evaluation
16.04 LTS xenial Ignored end of standard support
14.04 LTS trusty Ignored end of standard support
olm 24.10 oracular
Needs evaluation
24.04 LTS noble
Needs evaluation
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.10 kinetic Ignored end of life, was needs-triage
22.04 LTS jammy
Needs evaluation
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial Ignored end of standard support
14.04 LTS trusty Ignored end of standard support
thunderbird 24.10 oracular
Fixed 1:91.5.0+build1-0ubuntu1
24.04 LTS noble
Fixed 1:91.5.0+build1-0ubuntu1
23.10 mantic
Fixed 1:91.5.0+build1-0ubuntu1
23.04 lunar
Fixed 1:91.5.0+build1-0ubuntu1
22.10 kinetic
Fixed 1:91.5.0+build1-0ubuntu1
22.04 LTS jammy
Fixed 1:91.5.0+build1-0ubuntu1
21.10 impish
Fixed 1:91.5.0+build1-0ubuntu0.21.10.1
21.04 hirsute Ignored end of life
20.04 LTS focal
Fixed 1:91.5.0+build1-0ubuntu0.20.04.1
18.04 LTS bionic
Fixed 1:91.5.0+build1-0ubuntu0.18.04.1
16.04 LTS xenial Ignored end of standard support
14.04 LTS trusty Ignored end of standard support

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H