USN-5194-1: Olm vulnerability
Publication date
15 December 2021
Overview
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.
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
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 20.04 focal | libolm3 – 3.1.3+dfsg-2ubuntu0.1~esm1 | ||
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