USN-5194-1

Denis Kasak discovered that Olm was not verifying the length of input being processed by the olmpkdecrypt 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.

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

cves_map

{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-34813",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5194-1.json"