USN-5194-1: Olm vulnerability
15 December 2021
Olm could be made to crash or run programs if it received specially crafted input.
Releases
Packages
- olm - development files for the olm Double Ratchet implementation
Details
Denis Kasak discovered that Olm was not verifying the length of input being
processed by the olm_pk_decrypt module, which introduced a stack-based buffer
overflow vulnerability to the library. An attacker could use this to
cause a denial of service (application crash) or possibly execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04
-
libolm3
-
3.1.3+dfsg-2ubuntu0.1~esm1
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.