Medium
frr, quagga — security advisory
In FRRouting FRR before 8.5, the service user (usually frr) can escalate its privileges to root by monitoring the configuration directory (/etc/frr) and replacing config files upon creation with, for example, symlinks to change the ownership of arbitrary files. This is a TOCTOU Race Condition caused by a combination of touch and chown.
- Products
- frr, quagga
- Affected versions
- 0.99.24.1-2, 0.99.24.1-2ubuntu1, 0.99.24.1-2ubuntu1.1, 0.99.24.1-2ubuntu1.2, 0.99.24.1-2ubuntu1.3, 0.99.24.1-2ubuntu1.4, 0.99.24.1-2ubuntu1.4+esm1, 1.1.1-3, 1.1.1-3ubuntu1, 1.2.2-1, 1.2.2-1ubuntu1, 1.2.4-1, 1.2.4-1ubuntu0.1~esm1, 1.2.4-1ubuntu0.1~esm2, 1.2.4-4build1, 1.2.4-4ubuntu0.1, 1.2.4-4ubuntu0.4, 1.2.4-4ubuntu0.5, 6.0.2-2build2, 7.2-1ubuntu1, 7.2-1ubuntu2, 7.2.1-1, 7.2.1-1ubuntu0.1, 7.2.1-1ubuntu0.2, 7.2.1-1ubuntu0.2+esm1, 7.2.1-1ubuntu0.2+esm2, 7.2.1-1ubuntu0.2+esm3, 7.2.1-1ubuntu0.2+esm4, 7.5.1-1.1, 8.1-1, 8.1-1ubuntu1, 8.1-1ubuntu1.1, 8.1-1ubuntu1.10, 8.1-1ubuntu1.11, 8.1-1ubuntu1.13, 8.1-1ubuntu1.14, 8.1-1ubuntu1.15, 8.1-1ubuntu1.16, 8.1-1ubuntu1.2, 8.1-1ubuntu1.3, 8.1-1ubuntu1.4, 8.1-1ubuntu1.5, 8.1-1ubuntu1.6, 8.1-1ubuntu1.7, 8.1-1ubuntu1.8, 8.1-1ubuntu1.9
- Fixed versions
- Not specified
- CVEs
- CVE-2022-42917
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:38 UTC · Revision 1
Source evidence
In FRRouting FRR before 8.5, the service user (usually frr) can escalate its privileges to root by monitoring the configuration directory (/etc/frr) and replacing config files upon creation with, for example, symlinks to change the ownership of arbitrary files. This is a TOCTOU Race Condition caused by a combination of touch and chown.
osv:UBUNTU-CVE-2022-42917
quagga
Fixed versions: Not specified
quagga
Fixed versions: Not specified
quagga
Fixed versions: Not specified
frr
Fixed versions: Not specified
frr
Fixed versions: Not specified
Complete source record
{
"id": "f0c1f84fd2bbfe9568f4c450edca4203070e6b2f6d49d6ef1121b8d5656d7294",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2022-42917",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2022-42917",
"summary": "In FRRouting FRR before 8.5, the service user (usually frr) can escalate its privileges to root by monitoring the configuration directory (/etc/frr) and replacing config files upon creation with, for example, symlinks to change the ownership of arbitrary files. This is a TOCTOU Race Condition caused by a combination of touch and chown.",
"evidence": "osv:UBUNTU-CVE-2022-42917",
"products": [
{
"name": {
"value": "quagga",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.99.24.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.99.24.1-2ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "0.99.24.1-2ubuntu1.1",
"evidence": "/affected/0/versions"
},
{
"value": "0.99.24.1-2ubuntu1.2",
"evidence": "/affected/0/versions"
},
{
"value": "0.99.24.1-2ubuntu1.3",
"evidence": "/affected/0/versions"
},
{
"value": "0.99.24.1-2ubuntu1.4",
"evidence": "/affected/0/versions"
},
{
"value": "0.99.24.1-2ubuntu1.4+esm1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "quagga",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.1-3",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.1-3ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1.2.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.2.2-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1.2.4-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.2.4-1ubuntu0.1~esm1",
"evidence": "/affected/1/versions"
},
{
"value": "1.2.4-1ubuntu0.1~esm2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "quagga",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.2.4-4build1",
"evidence": "/affected/2/versions"
},
{
"value": "1.2.4-4ubuntu0.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.2.4-4ubuntu0.4",
"evidence": "/affected/2/versions"
},
{
"value": "1.2.4-4ubuntu0.5",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "frr",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.0.2-2build2",
"evidence": "/affected/3/versions"
},
{
"value": "7.2-1ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "7.2-1ubuntu2",
"evidence": "/affected/3/versions"
},
{
"value": "7.2.1-1",
"evidence": "/affected/3/versions"
},
{
"value": "7.2.1-1ubuntu0.1",
"evidence": "/affected/3/versions"
},
{
"value": "7.2.1-1ubuntu0.2",
"evidence": "/affected/3/versions"
},
{
"value": "7.2.1-1ubuntu0.2+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "7.2.1-1ubuntu0.2+esm2",
"evidence": "/affected/3/versions"
},
{
"value": "7.2.1-1ubuntu0.2+esm3",
"evidence": "/affected/3/versions"
},
{
"value": "7.2.1-1ubuntu0.2+esm4",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "frr",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "7.5.1-1.1",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.1",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.2",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.3",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.4",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.5",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.6",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.7",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.8",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.9",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.10",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.11",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.13",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.14",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.15",
"evidence": "/affected/4/versions"
},
{
"value": "8.1-1ubuntu1.16",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2022-42917",
"aliases": [
"UBUNTU-CVE-2022-42917"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "quagga",
"purl": "pkg:deb/ubuntu/quagga?arch=source&distro=esm-infra%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"0.99.24.1-2",
"0.99.24.1-2ubuntu1",
"0.99.24.1-2ubuntu1.1",
"0.99.24.1-2ubuntu1.2",
"0.99.24.1-2ubuntu1.3",
"0.99.24.1-2ubuntu1.4",
"0.99.24.1-2ubuntu1.4+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-42917.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "quagga",
"binary_version": "0.99.24.1-2ubuntu1.4+esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "quagga",
"purl": "pkg:deb/ubuntu/quagga?arch=source&distro=esm-infra%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"1.1.1-3",
"1.1.1-3ubuntu1",
"1.2.2-1",
"1.2.2-1ubuntu1",
"1.2.4-1",
"1.2.4-1ubuntu0.1~esm1",
"1.2.4-1ubuntu0.1~esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-42917.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "quagga",
"binary_version": "1.2.4-1ubuntu0.1~esm2"
},
{
"binary_name": "quagga-bgpd",
"binary_version": "1.2.4-1ubuntu0.1~esm2"
},
{
"binary_name": "quagga-core",
"binary_version": "1.2.4-1ubuntu0.1~esm2"
},
{
"binary_name": "quagga-isisd",
"binary_version": "1.2.4-1ubuntu0.1~esm2"
},
{
"binary_name": "quagga-ospf6d",
"binary_version": "1.2.4-1ubuntu0.1~esm2"
},
{
"binary_name": "quagga-ospfd",
"binary_version": "1.2.4-1ubuntu0.1~esm2"
},
{
"binary_name": "quagga-pimd",
"binary_version": "1.2.4-1ubuntu0.1~esm2"
},
{
"binary_name": "quagga-ripd",
"binary_version": "1.2.4-1ubuntu0.1~esm2"
},
{
"binary_name": "quagga-ripngd",
"binary_version": "1.2.4-1ubuntu0.1~esm2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "quagga",
"purl": "pkg:deb/ubuntu/quagga?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1.2.4-4build1",
"1.2.4-4ubuntu0.1",
"1.2.4-4ubuntu0.4",
"1.2.4-4ubuntu0.5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-42917.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "quagga",
"binary_version": "1.2.4-4ubuntu0.5"
},
{
"binary_name": "quagga-bgpd",
"binary_version": "1.2.4-4ubuntu0.5"
},
{
"binary_name": "quagga-core",
"binary_version": "1.2.4-4ubuntu0.5"
},
{
"binary_name": "quagga-isisd",
"binary_version": "1.2.4-4ubuntu0.5"
},
{
"binary_name": "quagga-ospf6d",
"binary_version": "1.2.4-4ubuntu0.5"
},
{
"binary_name": "quagga-ospfd",
"binary_version": "1.2.4-4ubuntu0.5"
},
{
"binary_name": "quagga-pimd",
"binary_version": "1.2.4-4ubuntu0.5"
},
{
"binary_name": "quagga-ripd",
"binary_version": "1.2.4-4ubuntu0.5"
},
{
"binary_name": "quagga-ripngd",
"binary_version": "1.2.4-4ubuntu0.5"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "frr",
"purl": "pkg:deb/ubuntu/frr?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"6.0.2-2build2",
"7.2-1ubuntu1",
"7.2-1ubuntu2",
"7.2.1-1",
"7.2.1-1ubuntu0.1",
"7.2.1-1ubuntu0.2",
"7.2.1-1ubuntu0.2+esm1",
"7.2.1-1ubuntu0.2+esm2",
"7.2.1-1ubuntu0.2+esm3",
"7.2.1-1ubuntu0.2+esm4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-42917.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "frr",
"binary_version": "7.2.1-1ubuntu0.2+esm4"
},
{
"binary_name": "frr-pythontools",
"binary_version": "7.2.1-1ubuntu0.2+esm4"
},
{
"binary_name": "frr-rpki-rtrlib",
"binary_version": "7.2.1-1ubuntu0.2+esm4"
},
{
"binary_name": "frr-snmp",
"binary_version": "7.2.1-1ubuntu0.2+esm4"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "frr",
"purl": "pkg:deb/ubuntu/frr?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"7.5.1-1.1",
"8.1-1",
"8.1-1ubuntu1",
"8.1-1ubuntu1.1",
"8.1-1ubuntu1.2",
"8.1-1ubuntu1.3",
"8.1-1ubuntu1.4",
"8.1-1ubuntu1.5",
"8.1-1ubuntu1.6",
"8.1-1ubuntu1.7",
"8.1-1ubuntu1.8",
"8.1-1ubuntu1.9",
"8.1-1ubuntu1.10",
"8.1-1ubuntu1.11",
"8.1-1ubuntu1.13",
"8.1-1ubuntu1.14",
"8.1-1ubuntu1.15",
"8.1-1ubuntu1.16"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-42917.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "frr",
"binary_version": "8.1-1ubuntu1.16"
},
{
"binary_name": "frr-pythontools",
"binary_version": "8.1-1ubuntu1.16"
},
{
"binary_name": "frr-rpki-rtrlib",
"binary_version": "8.1-1ubuntu1.16"
},
{
"binary_name": "frr-snmp",
"binary_version": "8.1-1ubuntu1.16"
}
]
}
}
],
"modified": "2026-10-17T12:57:15.953492434Z",
"provider": "osv",
"upstream": [
"CVE-2022-42917"
],
"references": [
"https://ubuntu.com/security/CVE-2022-42917",
"https://www.cve.org/CVERecord?id=CVE-2022-42917",
"https://frrouting.org/security/cve-2022-42917/"
]
},
"related_cves": [
{
"value": "CVE-2022-42917",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 357058,
"published_at": "2026-09-14T00:16:00+00:00"
}