CVE-2020-5202
Estado: ModificadaMedia (5.5)—
apt-cacher-ng through 3.3 allows local users to obtain sensitive information by hijacking the hardcoded TCP port. The /usr/lib/apt-cacher-ng/acngtool program attempts to connect to apt-cacher-ng via TCP on localhost port 3142, even if the explicit SocketPath=/var/run/apt-cacher-ng/socket command-line option is passed. The cron job /etc/cron.daily/apt-cacher-ng (which is active by default) attempts this periodically. Because 3142 is an unprivileged port, any local user can try to bind to this port and will receive requests from acngtool.
Leer descripción completaMostrar menos
There can be sensitive data in these requests, e.g., if AdminAuth is enabled in /etc/apt-cacher-ng/security.conf. This sensitive data can leak to unprivileged local users that manage to bind to this port before the apt-cacher-ng daemon can.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.46%
- Percentil entre todas las CVEs puntuadas: 38
- Fecha de la puntuación: 1/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (4)
CWE
- NVD-CWE-noinfo
Referencias
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00057.html
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00065.html
- http://www.openwall.com/lists/oss-security/2020/01/20/4
- http://www.openwall.com/lists/oss-security/2020/01/20/4
- http://www.openwall.com/lists/oss-security/2020/01/20/4
- http://www.openwall.com/lists/oss-security/2020/01/20/4
- https://seclists.org/oss-sec/2020/q1/21
- https://security-tracker.debian.org/tracker/CVE-2020-5202
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00057.html
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00065.html
- http://www.openwall.com/lists/oss-security/2020/01/20/4
- http://www.openwall.com/lists/oss-security/2020/01/20/4
- http://www.openwall.com/lists/oss-security/2020/01/20/4
- http://www.openwall.com/lists/oss-security/2020/01/20/4
- https://seclists.org/oss-sec/2020/q1/21
- https://security-tracker.debian.org/tracker/CVE-2020-5202
JSON original (NVD)
Mostrar
{
"id": "CVE-2020-5202",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 2.1,
"accessVector": "LOCAL",
"vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
"authentication": "NONE",
"integrityImpact": "NONE",
"accessComplexity": "LOW",
"availabilityImpact": "NONE",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "LOW",
"obtainAllPrivilege": false,
"exploitabilityScore": 3.9,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2020-01-21T18:15:13.060",
"references": [
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00057.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00065.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.openwall.com/lists/oss-security/2020/01/20/4",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.openwall.com/lists/oss-security/2020/01/20/4",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.openwall.com/lists/oss-security/2020/01/20/4",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.openwall.com/lists/oss-security/2020/01/20/4",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://seclists.org/oss-sec/2020/q1/21",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://security-tracker.debian.org/tracker/CVE-2020-5202",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00057.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00065.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.openwall.com/lists/oss-security/2020/01/20/4",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.openwall.com/lists/oss-security/2020/01/20/4",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.openwall.com/lists/oss-security/2020/01/20/4",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.openwall.com/lists/oss-security/2020/01/20/4",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://seclists.org/oss-sec/2020/q1/21",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security-tracker.debian.org/tracker/CVE-2020-5202",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "apt-cacher-ng through 3.3 allows local users to obtain sensitive information by hijacking the hardcoded TCP port. The /usr/lib/apt-cacher-ng/acngtool program attempts to connect to apt-cacher-ng via TCP on localhost port 3142, even if the explicit SocketPath=/var/run/apt-cacher-ng/socket command-line option is passed. The cron job /etc/cron.daily/apt-cacher-ng (which is active by default) attempts this periodically. Because 3142 is an unprivileged port, any local user can try to bind to this port and will receive requests from acngtool. There can be sensitive data in these requests, e.g., if AdminAuth is enabled in /etc/apt-cacher-ng/security.conf. This sensitive data can leak to unprivileged local users that manage to bind to this port before the apt-cacher-ng daemon can."
},
{
"lang": "es",
"value": "apt-cacher-ng versiones hasta 3.3, permite a usuarios locales obtener información confidencial al secuestrar el puerto TCP codificado. El programa /usr/lib/apt-cacher-ng/acngtool intenta conectarse a apt-cacher-ng por medio de TCP en el puerto localhost 3142, inclusive si es pasada la opción de línea de comando explicita SocketPath=/var/run/apt-cacher-ng/socket. El trabajo cron de /etc/cron.daily/apt-cacher-ng (que está activo por defecto) intenta esto periódicamente. Como el 3142 es un puerto sin privilegios, cualquier usuario local puede intentar vincularse a este puerto y recibirá peticiones desde acngtool. Puede haber datos confidenciales en estas peticiones, por ejemplo, si AdminAuth está habilitado en /etc/apt-cacher-ng/security.conf. Estos datos confidenciales pueden filtrarse a usuarios locales no privilegiados que logran unirse a este puerto antes de que el demonio apt-cacher-ng pueda hacerlo."
}
],
"lastModified": "2026-06-17T03:21:00.860",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9F58C1F6-AA0C-46EC-81CC-14F62DDD1D1F",
"versionEndIncluding": "3.3"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43"
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:opensuse:backports:sle-15:sp1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C84D9410-31B7-421A-AD99-8ED2E45A9BC6"
},
{
"criteria": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B620311B-34A3-48A6-82DF-6F078D7A4493"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org"
}