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CVE-2021-34813

CVE-2021-34813

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 olm_pk_decrypt has a stack-based buffer overflow. Remote code execution might be possible for some nonstandard build configurations.

CVSS 9.8 · Critical · EPSS 4.3% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • olm Debian:12

    Affected ranges
    • ECOSYSTEM: < 3.2.3~dfsg-3

    Update to 3.2.3~dfsg-3

  • olm Debian:13

    Affected ranges
    • ECOSYSTEM: < 3.2.3~dfsg-3

    Update to 3.2.3~dfsg-3

  • olm Debian:14

    Affected ranges
    • ECOSYSTEM: < 3.2.3~dfsg-3

    Update to 3.2.3~dfsg-3

  • olm Ubuntu:Pro:20.04:LTS

    Versions
    • 3.1.3+dfsg-2
    • 3.1.3+dfsg-2build1
    • 3.1.3+dfsg-2build2
    Affected ranges
    • ECOSYSTEM: < 3.1.3+dfsg-2ubuntu0.1~esm1

    Update to 3.1.3+dfsg-2ubuntu0.1~esm1

Original sources

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