UBUNTU-CVE-2021-34813

Matrix libolm before 3.2.3 allows a malicious Matrix homeserver to crash a client (while it is attempting to retrieve an Olm encrypted room key backup from the homeserver) because olmpkdecrypt has a stack-based buffer overflow. Remote code execution might be possible for some nonstandard build configurations.

References

Affected packages

Ubuntu:Pro:20.04:LTS / olm

Package

Name: olm
Purl: pkg:deb/ubuntu/olm@3.1.3+dfsg-2ubuntu0.1~esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.1.3+dfsg-2ubuntu0.1~esm1

Affected versions

3.*

3.1.3+dfsg-2

3.1.3+dfsg-2build1

3.1.3+dfsg-2build2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libolm-dev",
            "binary_version": "3.1.3+dfsg-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "libolm3",
            "binary_version": "3.1.3+dfsg-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "python3-olm",
            "binary_version": "3.1.3+dfsg-2ubuntu0.1~esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-34813.json"