CVE-2017-5495

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:quagga:quagga:*:*:*:*:*:*:*:*", "matchCriteriaId": "7A460953-662D-47E0-B16E-06CFC2378895", "versionEndIncluding": "1.1.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "All versions of Quagga, 0.93 through 1.1.0, are vulnerable to an unbounded memory allocation in the telnet 'vty' CLI, leading to a Denial-of-Service of Quagga daemons, or even the entire host. When Quagga daemons are configured with their telnet CLI enabled, anyone who can connect to the TCP ports can trigger this vulnerability, prior to authentication. Most distributions restrict the Quagga telnet interface to local access only by default. The Quagga telnet interface 'vty' input buffer grows automatically, without bound, so long as a newline is not entered. This allows an attacker to cause the Quagga daemon to allocate unbounded memory by sending very long strings without a newline. Eventually the daemon is terminated by the system, or the system itself runs out of memory. This is fixed in Quagga 1.1.1 and Free Range Routing (FRR) Protocol Suite 2017-01-10."}, {"lang": "es", "value": "Todas las versiones de Quagga, 0.93 hasta la versi\u00f3n 1.1.0, son vulnerables a una asignaci\u00f3n de memoria ilimitada en la CLI de telnet 'vty', conduciendo a una denegaci\u00f3n de servicio de los demonios de Quagga, o incluso a todo el host. Cuando los demonios de Quagga son configurados con su CLI de telnet habilitada, cualquiera que pueda conectarse a los puertos TCP puede desencadenar esta vulnerabilidad antes de la autenticaci\u00f3n. La mayor\u00eda de las distribuciones restringen la interfaz de telnet de Quagga para el acceso local s\u00f3lo por defecto. El b\u00fafer de entrada 'vty' de la interfaz de telnet de Quagga crece autom\u00e1ticamente, sin limite, siempre y cuando no se introduzca una nueva l\u00ednea. Esto permite a un atacante hacer que el demonio de Quagga asigne memoria ilimitada enviando cadenas muy largas sin una nueva l\u00ednea. Eventualmente el demonio es finalizado por el sistema, o el propio sistema se queda sin memoria. Esto se corrige en Quagga 1.1.1 y Free Range Routing (FRR) Protocol Suite 2017-01-10."}], "id": "CVE-2017-5495", "lastModified": "2026-06-17T01:20:36.913", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-01-24T07:59:00.287", "references": [{"source": "cve@mitre.org", "url": "http://rhn.redhat.com/errata/RHSA-2017-0794.html"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "http://savannah.nongnu.org/forum/forum.php?forum_id=8783"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/bid/95745"}, {"source": "cve@mitre.org", "url": "http://www.securitytracker.com/id/1037688"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/freerangerouting/frr/pull/63"}, {"source": "cve@mitre.org", "url": "https://lists.quagga.net/pipermail/quagga-dev/2017-January/016586.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://rhn.redhat.com/errata/RHSA-2017-0794.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "http://savannah.nongnu.org/forum/forum.php?forum_id=8783"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/bid/95745"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securitytracker.com/id/1037688"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/freerangerouting/frr/pull/63"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.quagga.net/pipermail/quagga-dev/2017-January/016586.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2017:0794", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "quagga-0:0.99.15-14.el6", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2017-03-21T00:00:00Z"}], "bugzilla": {"description": "quagga: Telnet interface input buffer allocates unbounded amounts of memory", "id": "1416013", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1416013"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-770", "details": ["All versions of Quagga, 0.93 through 1.1.0, are vulnerable to an unbounded memory allocation in the telnet 'vty' CLI, leading to a Denial-of-Service of Quagga daemons, or even the entire host. When Quagga daemons are configured with their telnet CLI enabled, anyone who can connect to the TCP ports can trigger this vulnerability, prior to authentication. Most distributions restrict the Quagga telnet interface to local access only by default. The Quagga telnet interface 'vty' input buffer grows automatically, without bound, so long as a newline is not entered. This allows an attacker to cause the Quagga daemon to allocate unbounded memory by sending very long strings without a newline. Eventually the daemon is terminated by the system, or the system itself runs out of memory. This is fixed in Quagga 1.1.1 and Free Range Routing (FRR) Protocol Suite 2017-01-10.", "A denial of service flaw affecting various daemons in Quagga was found. A remote attacker could use this flaw to cause the various Quagga daemons, which expose their telnet interface, to crash."], "name": "CVE-2017-5495", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "quagga", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "quagga", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2017-01-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-5495\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-5495\nhttps://lists.quagga.net/pipermail/quagga-dev/2017-January/016586.html"], "threat_severity": "Moderate"}

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