Medium
asterisk, pjproject — security advisory
PJSIP is a free and open source multimedia communication library written in C. Prior to commit 628b716, a stack buffer overflow exists in the PJLIB-UTIL telnet CLI front-end when redrawing the command line during history recall (handle_up_down() in cli_telnet.c). This affects only applications that enable the telnet CLI front-end (same gating as the related CLI issue). The line-redraw sequence for a recalled history entry can accumulate more data than a fixed-size stack buffer holds, which may lead to application termination. Exploitation requires access to the unauthenticated telnet CLI, which already permits arbitrary CLI commands, so the additional impact is limited. Applications that do not enable the telnet CLI front-end are not affected. This issue has been patched via commit 628b716.
- Products
- asterisk, pjproject
- 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, 1:22.5.2~dfsg+~cs6.15.60671435-1, 2.1.0.0.ast20130823-1, 2.1.0.0.ast20130823-1+deb8u1build0.16.04.1, 2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1, 2.6~dfsg-2, 2.7.1~dfsg-1, 2.7.1~dfsg-1build1, 2.7.2~dfsg-1, 2.7.2~dfsg-1ubuntu0.1~esm1, 2.7~dfsg-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-57165
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:47 UTC · Revision 1
Source evidence
PJSIP is a free and open source multimedia communication library written in C. Prior to commit 628b716, a stack buffer overflow exists in the PJLIB-UTIL telnet CLI front-end when redrawing the command line during history recall (handle_up_down() in cli_telnet.c). This affects only applications that enable the telnet CLI front-end (same gating as the related CLI issue). The line-redraw sequence for a recalled history entry can accumulate more data than a fixed-size stack buffer holds, which may lead to application termination. Exploitation requires access to the unauthenticated telnet CLI, which already permits arbitrary CLI commands, so the additional impact is limited. Applications that do not enable the telnet CLI front-end are not affected. This issue has been patched via commit 628b716.
osv:UBUNTU-CVE-2026-57165
asterisk
Fixed versions: Not specified
pjproject
Fixed versions: Not specified
asterisk
Fixed versions: Not specified
pjproject
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": "fbc45b5e0b906cebb35e6b4700af13d1acbaf9007129a0ce251c1bcd9edc7e29",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-57165",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-57165",
"summary": "PJSIP is a free and open source multimedia communication library written in C. Prior to commit 628b716, a stack buffer overflow exists in the PJLIB-UTIL telnet CLI front-end when redrawing the command line during history recall (handle_up_down() in cli_telnet.c). This affects only applications that enable the telnet CLI front-end (same gating as the related CLI issue). The line-redraw sequence for a recalled history entry can accumulate more data than a fixed-size stack buffer holds, which may lead to application termination. Exploitation requires access to the unauthenticated telnet CLI, which already permits arbitrary CLI commands, so the additional impact is limited. Applications that do not enable the telnet CLI front-end are not affected. This issue has been patched via commit 628b716.",
"evidence": "osv:UBUNTU-CVE-2026-57165",
"products": [
{
"name": {
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"evidence": "/affected/0/package/name"
},
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"affected_versions": [
{
"value": "1:13.1.0~dfsg-1.1ubuntu3",
"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
"value": "1:13.1.0~dfsg-1.1ubuntu4.1",
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/3/versions"
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{
"value": "2.7.2~dfsg-1",
"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "asterisk",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:16.2.1~dfsg-2build2",
"evidence": "/affected/4/versions"
},
{
"value": "1:16.2.1~dfsg-2build3",
"evidence": "/affected/4/versions"
},
{
"value": "1:16.2.1~dfsg-2ubuntu1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "asterisk",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "1:16.16.1~dfsg-2",
"evidence": "/affected/5/versions"
},
{
"value": "1:16.16.1~dfsg-4",
"evidence": "/affected/5/versions"
},
{
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"evidence": "/affected/5/versions"
},
{
"value": "1:16.16.1~dfsg+~2.10-1",
"evidence": "/affected/5/versions"
},
{
"value": "1:18.10.0~dfsg+~cs6.10.40431411-2",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "asterisk",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:20.4.0~dfsg+~cs6.13.40431414-2",
"evidence": "/affected/6/versions"
},
{
"value": "1:20.5.0~dfsg+~cs6.13.40431414-1",
"evidence": "/affected/6/versions"
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{
"value": "1:20.5.1~dfsg+~cs6.13.40431414-1",
"evidence": "/affected/6/versions"
},
{
"value": "1:20.5.2~dfsg+~cs6.13.40431414-1",
"evidence": "/affected/6/versions"
},
{
"value": "1:20.6.0~dfsg+~cs6.13.40431414-1",
"evidence": "/affected/6/versions"
},
{
"value": "1:20.6.0~dfsg+~cs6.13.40431414-2",
"evidence": "/affected/6/versions"
},
{
"value": "1:20.6.0~dfsg+~cs6.13.40431414-2build3",
"evidence": "/affected/6/versions"
},
{
"value": "1:20.6.0~dfsg+~cs6.13.40431414-2build4",
"evidence": "/affected/6/versions"
},
{
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{
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},
"prerequisites": [],
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"affected_versions": [
{
"value": "1:22.5.2~dfsg+~cs6.15.60671435-1",
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{
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}
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{
"name": {
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},
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"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-57165",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
},
{
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},
{
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}
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],
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},
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],
"database_specific": {
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},
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{
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},
{
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{
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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"
},
{
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}
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},
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]
}
},
{
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],
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},
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],
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},
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
"binary_name": "asterisk-voicemail",
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},
{
"binary_name": "asterisk-voicemail-imapstorage",
"binary_version": "1:13.18.3~dfsg-1ubuntu4"
},
{
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},
{
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}
]
}
},
{
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],
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"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
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"2.7.1~dfsg-1",
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"2.7.2~dfsg-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-57165.json"
},
"ecosystem_specific": {
"binaries": [
{
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},
{
"binary_name": "libpjlib-util2",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "libpjmedia-audiodev2",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "libpjmedia-codec2",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "libpjmedia-videodev2",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "libpjmedia2",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "libpjnath2",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "libpjsip-simple2",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "libpjsip-ua2",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "libpjsip2",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "libpjsua2",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "libpjsua2-2v5",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "python-pjproject",
"binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
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"modified": "2026-10-17T12:59:11.984109108Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-57165",
"https://www.cve.org/CVERecord?id=CVE-2026-57165",
"https://github.com/pjsip/pjproject/security/advisories/GHSA-rpq9-9fx7-95xw"
]
},
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{
"value": "CVE-2026-57165",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 359420,
"published_at": "2026-09-04T18:17:00+00:00"
}