UBUNTU-CVE-2021-26713

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Source
https://ubuntu.com/security/CVE-2021-26713
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-26713.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-26713
Upstream
Published
2021-02-19T20:15:00Z
Modified
2025-09-08T16:47:01Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A stack-based buffer overflow in resrtpasterisk.c in Sangoma Asterisk before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6 allows an authenticated WebRTC client to cause an Asterisk crash by sending multiple hold/unhold requests in quick succession. This is caused by a signedness comparison mismatch.

References

Affected packages

Ubuntu:22.04:LTS / asterisk

Package

Name
asterisk
Purl
pkg:deb/ubuntu/asterisk@1:18.10.0~dfsg+~cs6.10.40431411-2?arch=source&distro=jammy

Affected ranges

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

Affected versions

1:16.*

1:16.16.1~dfsg-2
1:16.16.1~dfsg-4
1:16.16.1~dfsg-4build1
1:16.16.1~dfsg+~2.10-1

1:18.*

1:18.10.0~dfsg+~cs6.10.40431411-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "asterisk",
            "binary_version": "1:18.10.0~dfsg+~cs6.10.40431411-2"
        },
        {
            "binary_name": "asterisk-config",
            "binary_version": "1:18.10.0~dfsg+~cs6.10.40431411-2"
        },
        {
            "binary_name": "asterisk-dahdi",
            "binary_version": "1:18.10.0~dfsg+~cs6.10.40431411-2"
        },
        {
            "binary_name": "asterisk-dev",
            "binary_version": "1:18.10.0~dfsg+~cs6.10.40431411-2"
        },
        {
            "binary_name": "asterisk-mobile",
            "binary_version": "1:18.10.0~dfsg+~cs6.10.40431411-2"
        },
        {
            "binary_name": "asterisk-modules",
            "binary_version": "1:18.10.0~dfsg+~cs6.10.40431411-2"
        },
        {
            "binary_name": "asterisk-mp3",
            "binary_version": "1:18.10.0~dfsg+~cs6.10.40431411-2"
        },
        {
            "binary_name": "asterisk-mysql",
            "binary_version": "1:18.10.0~dfsg+~cs6.10.40431411-2"
        },
        {
            "binary_name": "asterisk-ooh323",
            "binary_version": "1:18.10.0~dfsg+~cs6.10.40431411-2"
        },
        {
            "binary_name": "asterisk-tests",
            "binary_version": "1:18.10.0~dfsg+~cs6.10.40431411-2"
        },
        {
            "binary_name": "asterisk-vpb",
            "binary_version": "1:18.10.0~dfsg+~cs6.10.40431411-2"
        }
    ]
}

Ubuntu:24.04:LTS / asterisk

Package

Name
asterisk
Purl
pkg:deb/ubuntu/asterisk@1:20.6.0~dfsg+~cs6.13.40431414-2build5?arch=source&distro=noble

Affected ranges

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

Affected versions

1:20.*

1:20.4.0~dfsg+~cs6.13.40431414-2
1:20.5.0~dfsg+~cs6.13.40431414-1
1:20.5.1~dfsg+~cs6.13.40431414-1
1:20.5.2~dfsg+~cs6.13.40431414-1
1:20.6.0~dfsg+~cs6.13.40431414-1
1:20.6.0~dfsg+~cs6.13.40431414-2
1:20.6.0~dfsg+~cs6.13.40431414-2build3
1:20.6.0~dfsg+~cs6.13.40431414-2build4
1:20.6.0~dfsg+~cs6.13.40431414-2build5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "asterisk",
            "binary_version": "1:20.6.0~dfsg+~cs6.13.40431414-2build5"
        },
        {
            "binary_name": "asterisk-config",
            "binary_version": "1:20.6.0~dfsg+~cs6.13.40431414-2build5"
        },
        {
            "binary_name": "asterisk-dahdi",
            "binary_version": "1:20.6.0~dfsg+~cs6.13.40431414-2build5"
        },
        {
            "binary_name": "asterisk-dev",
            "binary_version": "1:20.6.0~dfsg+~cs6.13.40431414-2build5"
        },
        {
            "binary_name": "asterisk-mobile",
            "binary_version": "1:20.6.0~dfsg+~cs6.13.40431414-2build5"
        },
        {
            "binary_name": "asterisk-modules",
            "binary_version": "1:20.6.0~dfsg+~cs6.13.40431414-2build5"
        },
        {
            "binary_name": "asterisk-mp3",
            "binary_version": "1:20.6.0~dfsg+~cs6.13.40431414-2build5"
        },
        {
            "binary_name": "asterisk-mysql",
            "binary_version": "1:20.6.0~dfsg+~cs6.13.40431414-2build5"
        },
        {
            "binary_name": "asterisk-ooh323",
            "binary_version": "1:20.6.0~dfsg+~cs6.13.40431414-2build5"
        },
        {
            "binary_name": "asterisk-tests",
            "binary_version": "1:20.6.0~dfsg+~cs6.13.40431414-2build5"
        }
    ]
}

Ubuntu:25.04 / asterisk

Package

Name
asterisk
Purl
pkg:deb/ubuntu/asterisk@1:22.2.0~dfsg+~cs6.15.60671435-2?arch=source&distro=plucky

Affected ranges

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

Affected versions

1:20.*

1:20.8.1~dfsg+~cs6.14.40431414-1

1:22.*

1:22.0.0~dfsg+~cs6.14.60671435-1
1:22.1.0~dfsg+~cs6.14.60671435-1
1:22.1.1~dfsg+~cs6.14.60671435-1
1:22.2.0~dfsg+~cs6.15.60671435-1
1:22.2.0~dfsg+~cs6.15.60671435-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "asterisk",
            "binary_version": "1:22.2.0~dfsg+~cs6.15.60671435-2"
        },
        {
            "binary_name": "asterisk-config",
            "binary_version": "1:22.2.0~dfsg+~cs6.15.60671435-2"
        },
        {
            "binary_name": "asterisk-dahdi",
            "binary_version": "1:22.2.0~dfsg+~cs6.15.60671435-2"
        },
        {
            "binary_name": "asterisk-dev",
            "binary_version": "1:22.2.0~dfsg+~cs6.15.60671435-2"
        },
        {
            "binary_name": "asterisk-mobile",
            "binary_version": "1:22.2.0~dfsg+~cs6.15.60671435-2"
        },
        {
            "binary_name": "asterisk-modules",
            "binary_version": "1:22.2.0~dfsg+~cs6.15.60671435-2"
        },
        {
            "binary_name": "asterisk-mp3",
            "binary_version": "1:22.2.0~dfsg+~cs6.15.60671435-2"
        },
        {
            "binary_name": "asterisk-mysql",
            "binary_version": "1:22.2.0~dfsg+~cs6.15.60671435-2"
        },
        {
            "binary_name": "asterisk-ooh323",
            "binary_version": "1:22.2.0~dfsg+~cs6.15.60671435-2"
        },
        {
            "binary_name": "asterisk-tests",
            "binary_version": "1:22.2.0~dfsg+~cs6.15.60671435-2"
        }
    ]
}