High
asterisk — security advisory
Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk versions 18.20.0 and prior, 20.5.0 and prior, and 21.0.0; as well as ceritifed-asterisk 18.9-cert5 and prior, the 'update' functionality of the PJSIP_HEADER dialplan function can exceed the available buffer space for storing the new value of a header. By doing so this can overwrite memory or cause a crash. This is not externally exploitable, unless dialplan is explicitly written to update a header based on data from an outside source. If the 'update' functionality is not used the vulnerability does not occur. A patch is available at commit a1ca0268254374b515fa5992f01340f7717113fa.
- Products
- asterisk
- Affected versions
- 1:13.1.0~dfsg-1.1ubuntu3, 1:13.1.0~dfsg-1.1ubuntu4, 1:13.1.0~dfsg-1.1ubuntu4.1, 1:13.1.0~dfsg-1.1ubuntu4.1+esm1, 1:13.17.2~dfsg-1ubuntu1, 1:13.17.2~dfsg-2ubuntu1, 1:13.18.1~dfsg-1ubuntu1, 1:13.18.3~dfsg-1ubuntu1, 1:13.18.3~dfsg-1ubuntu2, 1:13.18.3~dfsg-1ubuntu3, 1:13.18.3~dfsg-1ubuntu4, 1:16.16.1~dfsg+~2.10-1, 1:16.16.1~dfsg-2, 1:16.16.1~dfsg-4, 1:16.16.1~dfsg-4build1, 1:16.2.1~dfsg-2build2, 1:16.2.1~dfsg-2build3, 1:16.2.1~dfsg-2ubuntu1, 1:18.10.0~dfsg+~cs6.10.40431411-2, 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, 1:22.10.0+dfsg+~cs6.17.60671434-1ubuntu2, 1:22.10.0+dfsg+~cs6.17.60671434-1ubuntu3, 1:22.2.0~dfsg+~cs6.15.60671435-2, 1:22.3.0~dfsg+~cs6.15.60671435-1, 1:22.4.1~dfsg+~cs6.15.60671435-1, 1:22.4.1~dfsg+~cs6.15.60671435-2, 1:22.5.1~dfsg+~cs6.15.60671435-1, 1:22.5.2~dfsg+~cs6.15.60671435-1
- Fixed versions
- Not specified
- CVEs
- CVE-2023-37457
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:04 UTC · Revision 1
Source evidence
Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk versions 18.20.0 and prior, 20.5.0 and prior, and 21.0.0; as well as ceritifed-asterisk 18.9-cert5 and prior, the 'update' functionality of the PJSIP_HEADER dialplan function can exceed the available buffer space for storing the new value of a header. By doing so this can overwrite memory or cause a crash. This is not externally exploitable, unless dialplan is explicitly written to update a header based on data from an outside source. If the 'update' functionality is not used the vulnerability does not occur. A patch is available at commit a1ca0268254374b515fa5992f01340f7717113fa.
osv:UBUNTU-CVE-2023-37457
asterisk
Fixed versions: Not specified
asterisk
Fixed versions: Not specified
asterisk
Fixed versions: Not specified
asterisk
Fixed versions: Not specified
asterisk
Fixed versions: Not specified
asterisk
Fixed versions: Not specified
asterisk
Fixed versions: Not specified
asterisk
Fixed versions: Not specified
Complete source record
{
"id": "969973d9913ede4902eaa2a91456a17d4cd71bd6859e76eaf8957634e3a1571c",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2023-37457",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2023-37457",
"summary": "Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk versions 18.20.0 and prior, 20.5.0 and prior, and 21.0.0; as well as ceritifed-asterisk 18.9-cert5 and prior, the 'update' functionality of the PJSIP_HEADER dialplan function can exceed the available buffer space for storing the new value of a header. By doing so this can overwrite memory or cause a crash. This is not externally exploitable, unless dialplan is explicitly written to update a header based on data from an outside source. If the 'update' functionality is not used the vulnerability does not occur. A patch is available at commit a1ca0268254374b515fa5992f01340f7717113fa.",
"evidence": "osv:UBUNTU-CVE-2023-37457",
"products": [
{
"name": {
"value": "asterisk",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:13.1.0~dfsg-1.1ubuntu3",
"evidence": "/affected/0/versions"
},
{
"value": "1:13.1.0~dfsg-1.1ubuntu4",
"evidence": "/affected/0/versions"
},
{
"value": "1:13.1.0~dfsg-1.1ubuntu4.1",
"evidence": "/affected/0/versions"
},
{
"value": "1:13.1.0~dfsg-1.1ubuntu4.1+esm1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "asterisk",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:13.17.2~dfsg-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1:13.17.2~dfsg-2ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1:13.18.1~dfsg-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1:13.18.3~dfsg-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1:13.18.3~dfsg-1ubuntu2",
"evidence": "/affected/1/versions"
},
{
"value": "1:13.18.3~dfsg-1ubuntu3",
"evidence": "/affected/1/versions"
},
{
"value": "1:13.18.3~dfsg-1ubuntu4",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "asterisk",
"evidence": "/affected/2/package/name"
},
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"affected_versions": [
{
"value": "1:16.2.1~dfsg-2build2",
"evidence": "/affected/2/versions"
},
{
"value": "1:16.2.1~dfsg-2build3",
"evidence": "/affected/2/versions"
},
{
"value": "1:16.2.1~dfsg-2ubuntu1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "asterisk",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:16.16.1~dfsg-2",
"evidence": "/affected/3/versions"
},
{
"value": "1:16.16.1~dfsg-4",
"evidence": "/affected/3/versions"
},
{
"value": "1:16.16.1~dfsg-4build1",
"evidence": "/affected/3/versions"
},
{
"value": "1:16.16.1~dfsg+~2.10-1",
"evidence": "/affected/3/versions"
},
{
"value": "1:18.10.0~dfsg+~cs6.10.40431411-2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "asterisk",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:20.4.0~dfsg+~cs6.13.40431414-2",
"evidence": "/affected/4/versions"
},
{
"value": "1:20.5.0~dfsg+~cs6.13.40431414-1",
"evidence": "/affected/4/versions"
},
{
"value": "1:20.5.1~dfsg+~cs6.13.40431414-1",
"evidence": "/affected/4/versions"
},
{
"value": "1:20.5.2~dfsg+~cs6.13.40431414-1",
"evidence": "/affected/4/versions"
},
{
"value": "1:20.6.0~dfsg+~cs6.13.40431414-1",
"evidence": "/affected/4/versions"
},
{
"value": "1:20.6.0~dfsg+~cs6.13.40431414-2",
"evidence": "/affected/4/versions"
},
{
"value": "1:20.6.0~dfsg+~cs6.13.40431414-2build3",
"evidence": "/affected/4/versions"
},
{
"value": "1:20.6.0~dfsg+~cs6.13.40431414-2build4",
"evidence": "/affected/4/versions"
},
{
"value": "1:20.6.0~dfsg+~cs6.13.40431414-2build5",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "asterisk",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:22.2.0~dfsg+~cs6.15.60671435-2",
"evidence": "/affected/5/versions"
},
{
"value": "1:22.3.0~dfsg+~cs6.15.60671435-1",
"evidence": "/affected/5/versions"
},
{
"value": "1:22.4.1~dfsg+~cs6.15.60671435-1",
"evidence": "/affected/5/versions"
},
{
"value": "1:22.4.1~dfsg+~cs6.15.60671435-2",
"evidence": "/affected/5/versions"
},
{
"value": "1:22.5.1~dfsg+~cs6.15.60671435-1",
"evidence": "/affected/5/versions"
},
{
"value": "1:22.5.2~dfsg+~cs6.15.60671435-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "asterisk",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:22.5.2~dfsg+~cs6.15.60671435-1",
"evidence": "/affected/6/versions"
},
{
"value": "1:22.10.0+dfsg+~cs6.17.60671434-1ubuntu2",
"evidence": "/affected/6/versions"
},
{
"value": "1:22.10.0+dfsg+~cs6.17.60671434-1ubuntu3",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "asterisk",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "1:22.5.2~dfsg+~cs6.15.60671435-1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2023-37457",
"aliases": [
"UBUNTU-CVE-2023-37457"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/asterisk?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"1:13.1.0~dfsg-1.1ubuntu3",
"1:13.1.0~dfsg-1.1ubuntu4",
"1:13.1.0~dfsg-1.1ubuntu4.1",
"1:13.1.0~dfsg-1.1ubuntu4.1+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-37457.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "asterisk",
"binary_version": "1:13.1.0~dfsg-1.1ubuntu4.1+esm1"
},
{
"binary_name": "asterisk-config",
"binary_version": "1:13.1.0~dfsg-1.1ubuntu4.1+esm1"
},
{
"binary_name": "asterisk-dahdi",
"binary_version": "1:13.1.0~dfsg-1.1ubuntu4.1+esm1"
},
{
"binary_name": "asterisk-mobile",
"binary_version": "1:13.1.0~dfsg-1.1ubuntu4.1+esm1"
},
{
"binary_name": "asterisk-modules",
"binary_version": "1:13.1.0~dfsg-1.1ubuntu4.1+esm1"
},
{
"binary_name": "asterisk-mp3",
"binary_version": "1:13.1.0~dfsg-1.1ubuntu4.1+esm1"
},
{
"binary_name": "asterisk-mysql",
"binary_version": "1:13.1.0~dfsg-1.1ubuntu4.1+esm1"
},
{
"binary_name": "asterisk-ooh323",
"binary_version": "1:13.1.0~dfsg-1.1ubuntu4.1+esm1"
},
{
"binary_name": "asterisk-voicemail",
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},
{
"binary_name": "asterisk-voicemail-imapstorage",
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},
{
"binary_name": "asterisk-voicemail-odbcstorage",
"binary_version": "1:13.1.0~dfsg-1.1ubuntu4.1+esm1"
},
{
"binary_name": "asterisk-vpb",
"binary_version": "1:13.1.0~dfsg-1.1ubuntu4.1+esm1"
}
]
}
},
{
"ranges": [
{
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"events": [
{
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}
]
}
],
"package": {
"name": "asterisk",
"purl": "pkg:deb/ubuntu/asterisk?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1:13.17.2~dfsg-1ubuntu1",
"1:13.17.2~dfsg-2ubuntu1",
"1:13.18.1~dfsg-1ubuntu1",
"1:13.18.3~dfsg-1ubuntu1",
"1:13.18.3~dfsg-1ubuntu2",
"1:13.18.3~dfsg-1ubuntu3",
"1:13.18.3~dfsg-1ubuntu4"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
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"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-config",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-dahdi",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-mobile",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-modules",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-mp3",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-mysql",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-ooh323",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-tests",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-voicemail",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-voicemail-imapstorage",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-voicemail-odbcstorage",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
"binary_name": "asterisk-vpb",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
}
]
}
},
{
"ranges": [
{
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{
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}
]
}
],
"package": {
"name": "asterisk",
"purl": "pkg:deb/ubuntu/asterisk?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1:16.2.1~dfsg-2build2",
"1:16.2.1~dfsg-2build3",
"1:16.2.1~dfsg-2ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-37457.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "asterisk",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
},
{
"binary_name": "asterisk-config",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
},
{
"binary_name": "asterisk-dahdi",
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},
{
"binary_name": "asterisk-mobile",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
},
{
"binary_name": "asterisk-modules",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
},
{
"binary_name": "asterisk-mp3",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
},
{
"binary_name": "asterisk-mysql",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
},
{
"binary_name": "asterisk-ooh323",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
},
{
"binary_name": "asterisk-tests",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
},
{
"binary_name": "asterisk-voicemail",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
},
{
"binary_name": "asterisk-voicemail-imapstorage",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
},
{
"binary_name": "asterisk-voicemail-odbcstorage",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
},
{
"binary_name": "asterisk-vpb",
"binary_version": "1:16.2.1~dfsg-2ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "asterisk",
"purl": "pkg:deb/ubuntu/asterisk?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"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",
"1:18.10.0~dfsg+~cs6.10.40431411-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-37457.json"
},
"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-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"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "asterisk",
"purl": "pkg:deb/ubuntu/asterisk?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-37457.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "asterisk",
"binary_version": "1:20.6.0~dfsg+~cs6.13.40431414-2build5"
},
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"modified": "2026-10-17T12:56:24.828062887Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2023-37457",
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]
},
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"evidence": "/upstream"
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],
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},
"source_id": "core-osv",
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"published_at": "2023-12-14T20:15:00+00:00"
}