Buffer overflow in olm - CVE-2021-44538
Published: December 21, 2021
Vulnerability identifier: #VU59080
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-44538
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service attack.
The vulnerability exists due to a boundary error within the olm_session_describe() function in libolm. A remote attacker send specially crafted messages to the application that is using the affected library, trigger buffer overflow and perform a denial of service (DoS) attack
Affected software
olm
Matrix Javascript SDK
SUSE Linux Enterprise Workstation Extension
Ubuntu
Mozilla Thunderbird
thunderbird (Debian package)
MozillaThunderbird
MozillaThunderbird-debuginfo
MozillaThunderbird-debugsource
MozillaThunderbird-translations-common
MozillaThunderbird-translations-other
thunderbird (Ubuntu package)
Matrix Javascript SDK
SUSE Linux Enterprise Workstation Extension
Ubuntu
Mozilla Thunderbird
thunderbird (Debian package)
MozillaThunderbird
MozillaThunderbird-debuginfo
MozillaThunderbird-debugsource
MozillaThunderbird-translations-common
MozillaThunderbird-translations-other
thunderbird (Ubuntu package)
How to mitigate CVE-2021-44538
Install updates from vendor's website.
olm - update to 3.2.8
Matrix Javascript SDK - update to 15.2.1
Mozilla Thunderbird - update to 91.4.1
thunderbird (Debian package) - addressed in versions 1:91.4.1-1~deb10u1, 1:91.4.1-1~deb11u1
MozillaThunderbird - update to 91.4.1-8.48.1
MozillaThunderbird-debuginfo - update to 91.4.1-8.48.1
MozillaThunderbird-debugsource - update to 91.4.1-8.48.1
MozillaThunderbird-translations-common - update to 91.4.1-8.48.1
MozillaThunderbird-translations-other - update to 91.4.1-8.48.1
thunderbird (Ubuntu package) - addressed in versions 1:91.5.0+build1-0ubuntu0.18.04.1, 1:91.5.0+build1-0ubuntu0.20.04.1, 1:91.5.0+build1-0ubuntu0.21.10.1
Matrix Javascript SDK - update to 15.2.1
Mozilla Thunderbird - update to 91.4.1
thunderbird (Debian package) - addressed in versions 1:91.4.1-1~deb10u1, 1:91.4.1-1~deb11u1
MozillaThunderbird - update to 91.4.1-8.48.1
MozillaThunderbird-debuginfo - update to 91.4.1-8.48.1
MozillaThunderbird-debugsource - update to 91.4.1-8.48.1
MozillaThunderbird-translations-common - update to 91.4.1-8.48.1
MozillaThunderbird-translations-other - update to 91.4.1-8.48.1
thunderbird (Ubuntu package) - addressed in versions 1:91.5.0+build1-0ubuntu0.18.04.1, 1:91.5.0+build1-0ubuntu0.20.04.1, 1:91.5.0+build1-0ubuntu0.21.10.1