UBUNTU-CVE-2021-44538

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Source
https://ubuntu.com/security/CVE-2021-44538
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-44538.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-44538
Upstream
Downstream
Related
Published
2021-12-14T14:15:00Z
Modified
2025-09-08T16:47:25Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The olmsessiondescribe function in Matrix libolm before 3.2.7 is vulnerable to a buffer overflow. The Olm session object represents a cryptographic channel between two parties. Therefore, its state is partially controllable by the remote party of the channel. Attackers can construct a crafted sequence of messages to manipulate the state of the receiver's session in such a way that, for some buffer sizes, a buffer overflow happens on a call to olmsessiondescribe. Furthermore, safe buffer sizes were undocumented. The overflow content is partially controllable by the attacker and limited to ASCII spaces and digits. The known affected products are Element Web And SchildiChat Web.

References

Affected packages

Ubuntu:18.04:LTS / thunderbird

Package

Name
thunderbird
Purl
pkg:deb/ubuntu/thunderbird@1:91.5.0+build1-0ubuntu0.18.04.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:91.5.0+build1-0ubuntu0.18.04.1

Affected versions

1:52.*

1:52.4.0+build1-0ubuntu2
1:52.6.0+build1-0ubuntu1
1:52.7.0+build1-0ubuntu1
1:52.8.0+build1-0ubuntu0.18.04.1
1:52.9.1+build3-0ubuntu0.18.04.1

1:60.*

1:60.2.1+build1-0ubuntu0.18.04.2
1:60.4.0+build2-0ubuntu0.18.04.1
1:60.5.1+build2-0ubuntu0.18.04.1
1:60.6.1+build2-0ubuntu0.18.04.1
1:60.7.0+build1-0ubuntu0.18.04.1
1:60.7.1+build1-0ubuntu0.18.04.1
1:60.7.2+build2-0ubuntu0.18.04.1
1:60.8.0+build1-0ubuntu0.18.04.1
1:60.9.0+build1-0ubuntu0.18.04.1

1:68.*

1:68.2.1+build1-0ubuntu0.18.04.1
1:68.2.2+build1-0ubuntu0.18.04.1
1:68.4.1+build1-0ubuntu0.18.04.1
1:68.7.0+build1-0ubuntu0.18.04.1
1:68.8.0+build2-0ubuntu0.18.04.2
1:68.10.0+build1-0ubuntu0.18.04.1

1:78.*

1:78.8.1+build1-0ubuntu0.18.04.1
1:78.11.0+build1-0ubuntu0.18.04.2
1:78.13.0+build1-0ubuntu0.18.04.1
1:78.14.0+build1-0ubuntu0.18.04.1
1:78.14.0+build1-0ubuntu0.18.04.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1",
            "binary_name": "thunderbird"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1",
            "binary_name": "thunderbird-dev"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1",
            "binary_name": "thunderbird-gnome-support"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1",
            "binary_name": "thunderbird-mozsymbols"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1",
            "binary_name": "xul-ext-calendar-timezones"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1",
            "binary_name": "xul-ext-gdata-provider"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1",
            "binary_name": "xul-ext-lightning"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / olm

Package

Name
olm
Purl
pkg:deb/ubuntu/olm@2.2.2+git20170526.0fd768e+dfsg-1?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.2+git20170526.0fd768e+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.2.2+git20170526.0fd768e+dfsg-1",
            "binary_name": "libolm-dev"
        },
        {
            "binary_version": "2.2.2+git20170526.0fd768e+dfsg-1",
            "binary_name": "libolm2"
        },
        {
            "binary_version": "2.2.2+git20170526.0fd768e+dfsg-1",
            "binary_name": "python-olm"
        }
    ]
}

Ubuntu:20.04:LTS / thunderbird

Package

Name
thunderbird
Purl
pkg:deb/ubuntu/thunderbird@1:91.5.0+build1-0ubuntu0.20.04.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:91.5.0+build1-0ubuntu0.20.04.1

Affected versions

1:68.*

1:68.1.2+build1-0ubuntu1
1:68.1.2+build1-0ubuntu2
1:68.2.1+build1-0ubuntu1
1:68.2.2+build1-0ubuntu1
1:68.3.0+build2-0ubuntu1
1:68.3.1+build1-0ubuntu2
1:68.4.1+build1-0ubuntu1
1:68.4.2+build2-0ubuntu1
1:68.5.0+build1-0ubuntu1
1:68.6.0+build2-0ubuntu1
1:68.7.0+build1-0ubuntu1
1:68.7.0+build1-0ubuntu2
1:68.8.0+build2-0ubuntu0.20.04.2
1:68.10.0+build1-0ubuntu0.20.04.1

1:78.*

1:78.7.1+build1-0ubuntu0.20.04.1
1:78.8.1+build1-0ubuntu0.20.04.1
1:78.11.0+build1-0ubuntu0.20.04.2
1:78.13.0+build1-0ubuntu0.20.04.2
1:78.14.0+build1-0ubuntu0.20.04.1
1:78.14.0+build1-0ubuntu0.20.04.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1",
            "binary_name": "thunderbird"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1",
            "binary_name": "thunderbird-dev"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1",
            "binary_name": "thunderbird-gnome-support"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1",
            "binary_name": "thunderbird-mozsymbols"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1",
            "binary_name": "xul-ext-calendar-timezones"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1",
            "binary_name": "xul-ext-gdata-provider"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1",
            "binary_name": "xul-ext-lightning"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / node-matrix-js-sdk

Package

Name
node-matrix-js-sdk
Purl
pkg:deb/ubuntu/node-matrix-js-sdk@0.9.2-1?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.9.2-1",
            "binary_name": "libjs-matrix-js-sdk"
        },
        {
            "binary_version": "0.9.2-1",
            "binary_name": "node-matrix-js-sdk"
        }
    ]
}

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

Affected versions

3.*

3.1.3+dfsg-2
3.1.3+dfsg-2build1
3.1.3+dfsg-2build2
3.1.3+dfsg-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.1.3+dfsg-2ubuntu0.1~esm1",
            "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"
        }
    ]
}

Ubuntu:22.04:LTS / node-matrix-js-sdk

Package

Name
node-matrix-js-sdk
Purl
pkg:deb/ubuntu/node-matrix-js-sdk@9.11.0+~cs9.9.16-1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

9.*

9.3.0+~cs9.9.16-2
9.11.0+~cs9.9.16-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.11.0+~cs9.9.16-1",
            "binary_name": "libjs-matrix-js-sdk"
        },
        {
            "binary_version": "9.11.0+~cs9.9.16-1",
            "binary_name": "node-matrix-js-sdk"
        }
    ]
}

Ubuntu:22.04:LTS / olm

Package

Name
olm
Purl
pkg:deb/ubuntu/olm@3.2.10~dfsg-6ubuntu1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.2.1~dfsg-7ubuntu2
3.2.1~dfsg-7ubuntu3
3.2.10~dfsg-4ubuntu1
3.2.10~dfsg-5ubuntu1
3.2.10~dfsg-6ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.2.10~dfsg-6ubuntu1",
            "binary_name": "libjs-olm"
        },
        {
            "binary_version": "3.2.10~dfsg-6ubuntu1",
            "binary_name": "libolm-dev"
        },
        {
            "binary_version": "3.2.10~dfsg-6ubuntu1",
            "binary_name": "libolm3"
        },
        {
            "binary_version": "3.2.10~dfsg-6ubuntu1",
            "binary_name": "python3-olm"
        }
    ]
}

Ubuntu:22.04:LTS / thunderbird

Package

Name
thunderbird
Purl
pkg:deb/ubuntu/thunderbird@1:91.5.0+build1-0ubuntu1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:91.5.0+build1-0ubuntu1

Affected versions

1:91.*

1:91.1.2+build1-0ubuntu1
1:91.3.0+build2-0ubuntu1
1:91.3.1+build1-0ubuntu1
1:91.3.2+build1-0ubuntu1
1:91.4.0+build1.1-0ubuntu1
1:91.4.0+build2-0ubuntu1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1:91.5.0+build1-0ubuntu1",
            "binary_name": "thunderbird"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu1",
            "binary_name": "thunderbird-dev"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu1",
            "binary_name": "thunderbird-gnome-support"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu1",
            "binary_name": "thunderbird-mozsymbols"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu1",
            "binary_name": "xul-ext-calendar-timezones"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu1",
            "binary_name": "xul-ext-gdata-provider"
        },
        {
            "binary_version": "1:91.5.0+build1-0ubuntu1",
            "binary_name": "xul-ext-lightning"
        }
    ]
}

Ubuntu:24.04:LTS / node-matrix-js-sdk

Package

Name
node-matrix-js-sdk
Purl
pkg:deb/ubuntu/node-matrix-js-sdk@9.11.0+~cs9.9.16-2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

9.*

9.11.0+~cs9.9.16-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.11.0+~cs9.9.16-2",
            "binary_name": "libjs-matrix-js-sdk"
        },
        {
            "binary_version": "9.11.0+~cs9.9.16-2",
            "binary_name": "node-matrix-js-sdk"
        }
    ]
}

Ubuntu:24.04:LTS / olm

Package

Name
olm
Purl
pkg:deb/ubuntu/olm@3.2.16+dfsg-2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.2.13~dfsg-1ubuntu1
3.2.15~dfsg-1ubuntu1
3.2.16+dfsg-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.2.16+dfsg-2",
            "binary_name": "libjs-olm"
        },
        {
            "binary_version": "3.2.16+dfsg-2",
            "binary_name": "libolm-dev"
        },
        {
            "binary_version": "3.2.16+dfsg-2",
            "binary_name": "libolm3"
        },
        {
            "binary_version": "3.2.16+dfsg-2",
            "binary_name": "python3-olm"
        }
    ]
}

Ubuntu:25.04 / olm

Package

Name
olm
Purl
pkg:deb/ubuntu/olm@3.2.16+dfsg-3?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.2.16+dfsg-2
3.2.16+dfsg-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.2.16+dfsg-3",
            "binary_name": "libolm-dev"
        },
        {
            "binary_version": "3.2.16+dfsg-3",
            "binary_name": "libolm3"
        },
        {
            "binary_version": "3.2.16+dfsg-3",
            "binary_name": "python3-olm"
        }
    ]
}