CVE-2019-18634
Vulnerability from cvelistv5
Published
2020-01-29 17:23
Modified
2024-08-05 01:54
Severity ?
Summary
In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.
References
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html
cve@mitre.orghttp://packetstormsecurity.com/files/156174/Slackware-Security-Advisory-sudo-Updates.htmlThird Party Advisory, VDB Entry
cve@mitre.orghttp://packetstormsecurity.com/files/156189/Sudo-1.8.25p-Buffer-Overflow.htmlThird Party Advisory, VDB Entry
cve@mitre.orghttp://seclists.org/fulldisclosure/2020/Jan/40Mailing List, Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2020/01/30/6Mailing List, Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2020/01/31/1Mailing List, Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2020/02/05/2Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2020/02/05/5Exploit, Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2020:0487
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2020:0509
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2020:0540
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2020:0726
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2020/02/msg00002.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/
cve@mitre.orghttps://seclists.org/bugtraq/2020/Feb/2Mailing List, Third Party Advisory
cve@mitre.orghttps://seclists.org/bugtraq/2020/Feb/3Mailing List, Third Party Advisory
cve@mitre.orghttps://seclists.org/bugtraq/2020/Jan/44Mailing List, Third Party Advisory
cve@mitre.orghttps://security.gentoo.org/glsa/202003-12
cve@mitre.orghttps://security.netapp.com/advisory/ntap-20200210-0001/
cve@mitre.orghttps://support.apple.com/kb/HT210919Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/4263-1/
cve@mitre.orghttps://usn.ubuntu.com/4263-2/
cve@mitre.orghttps://www.debian.org/security/2020/dsa-4614Third Party Advisory
cve@mitre.orghttps://www.sudo.ws/alerts/pwfeedback.htmlExploit, Vendor Advisory
cve@mitre.orghttps://www.sudo.ws/security.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/156174/Slackware-Security-Advisory-sudo-Updates.htmlThird Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/156189/Sudo-1.8.25p-Buffer-Overflow.htmlThird Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2020/Jan/40Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/01/30/6Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/01/31/1Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/02/05/2Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/02/05/5Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2020:0487
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2020:0509
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2020:0540
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2020:0726
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/02/msg00002.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/bugtraq/2020/Feb/2Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/bugtraq/2020/Feb/3Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/bugtraq/2020/Jan/44Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202003-12
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20200210-0001/
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT210919Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4263-1/
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4263-2/
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2020/dsa-4614Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.sudo.ws/alerts/pwfeedback.htmlExploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.sudo.ws/security.htmlVendor Advisory
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

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                     url: "https://www.sudo.ws/security.html",
                  },
                  {
                     name: "https://www.sudo.ws/alerts/pwfeedback.html",
                     refsource: "CONFIRM",
                     url: "https://www.sudo.ws/alerts/pwfeedback.html",
                  },
                  {
                     name: "[oss-security] 20200130 CVE-2019-18634: buffer overflow in sudo when pwfeedback is enabled",
                     refsource: "MLIST",
                     url: "http://www.openwall.com/lists/oss-security/2020/01/30/6",
                  },
                  {
                     name: "[oss-security] 20200131 Re: CVE-2019-18634: buffer overflow in sudo when pwfeedback is enabled",
                     refsource: "MLIST",
                     url: "http://www.openwall.com/lists/oss-security/2020/01/31/1",
                  },
                  {
                     name: "20200131 APPLE-SA-2020-1-28-2 macOS Catalina 10.15.3, Security Update 2020-001 Mojave, Security Update 2020-001 High Sierra",
                     refsource: "FULLDISC",
                     url: "http://seclists.org/fulldisclosure/2020/Jan/40",
                  },
                  {
                     name: "DSA-4614",
                     refsource: "DEBIAN",
                     url: "https://www.debian.org/security/2020/dsa-4614",
                  },
                  {
                     name: "[debian-lts-announce] 20200201 [SECURITY] [DLA 2094-1] sudo security update",
                     refsource: "MLIST",
                     url: "https://lists.debian.org/debian-lts-announce/2020/02/msg00002.html",
                  },
                  {
                     name: "20200203 [slackware-security] sudo (SSA:2020-031-01)",
                     refsource: "BUGTRAQ",
                     url: "https://seclists.org/bugtraq/2020/Feb/3",
                  },
                  {
                     name: "20200203 [SECURITY] [DSA 4614-1] sudo security update",
                     refsource: "BUGTRAQ",
                     url: "https://seclists.org/bugtraq/2020/Feb/2",
                  },
                  {
                     name: "http://packetstormsecurity.com/files/156174/Slackware-Security-Advisory-sudo-Updates.html",
                     refsource: "MISC",
                     url: "http://packetstormsecurity.com/files/156174/Slackware-Security-Advisory-sudo-Updates.html",
                  },
                  {
                     name: "http://packetstormsecurity.com/files/156189/Sudo-1.8.25p-Buffer-Overflow.html",
                     refsource: "MISC",
                     url: "http://packetstormsecurity.com/files/156189/Sudo-1.8.25p-Buffer-Overflow.html",
                  },
                  {
                     name: "[oss-security] 20200205 Re: CVE-2019-18634: buffer overflow in sudo when pwfeedback is enabled",
                     refsource: "MLIST",
                     url: "http://www.openwall.com/lists/oss-security/2020/02/05/2",
                  },
                  {
                     name: "[oss-security] 20200205 Re: CVE-2019-18634: buffer overflow in sudo when pwfeedback is enabled",
                     refsource: "MLIST",
                     url: "http://www.openwall.com/lists/oss-security/2020/02/05/5",
                  },
                  {
                     name: "USN-4263-1",
                     refsource: "UBUNTU",
                     url: "https://usn.ubuntu.com/4263-1/",
                  },
                  {
                     name: "https://security.netapp.com/advisory/ntap-20200210-0001/",
                     refsource: "CONFIRM",
                     url: "https://security.netapp.com/advisory/ntap-20200210-0001/",
                  },
                  {
                     name: "USN-4263-2",
                     refsource: "UBUNTU",
                     url: "https://usn.ubuntu.com/4263-2/",
                  },
                  {
                     name: "RHSA-2020:0487",
                     refsource: "REDHAT",
                     url: "https://access.redhat.com/errata/RHSA-2020:0487",
                  },
                  {
                     name: "RHSA-2020:0509",
                     refsource: "REDHAT",
                     url: "https://access.redhat.com/errata/RHSA-2020:0509",
                  },
                  {
                     name: "RHSA-2020:0540",
                     refsource: "REDHAT",
                     url: "https://access.redhat.com/errata/RHSA-2020:0540",
                  },
                  {
                     name: "openSUSE-SU-2020:0244",
                     refsource: "SUSE",
                     url: "http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html",
                  },
                  {
                     name: "FEDORA-2020-8b563bc5f4",
                     refsource: "FEDORA",
                     url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/",
                  },
                  {
                     name: "RHSA-2020:0726",
                     refsource: "REDHAT",
                     url: "https://access.redhat.com/errata/RHSA-2020:0726",
                  },
                  {
                     name: "GLSA-202003-12",
                     refsource: "GENTOO",
                     url: "https://security.gentoo.org/glsa/202003-12",
                  },
                  {
                     name: "FEDORA-2020-7c1b270959",
                     refsource: "FEDORA",
                     url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/",
                  },
               ],
            },
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
      assignerShortName: "mitre",
      cveId: "CVE-2019-18634",
      datePublished: "2020-01-29T17:23:26",
      dateReserved: "2019-10-30T00:00:00",
      dateUpdated: "2024-08-05T01:54:14.581Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2019-18634\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2020-01-29T18:15:12.247\",\"lastModified\":\"2024-11-21T04:33:25.447\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.\"},{\"lang\":\"es\",\"value\":\"En Sudo anterior a la versión 1.8.26, si pwfeedback está habilitado en / etc / sudoers, los usuarios pueden desencadenar un desbordamiento de búfer basado en pila en el proceso de sudo privilegiado. (pwfeedback es una configuración predeterminada en Linux Mint y sistema operativo elemental; sin embargo, NO es el valor predeterminado para paquetes ascendentes y muchos otros, y existiría solo si lo habilita un administrador). El atacante debe entregar una cadena larga al stdin de getln () en tgetpass.c.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:N/C:P/I:P/A:P\",\"baseScore\":4.6,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":3.9,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.7.1\",\"versionEndExcluding\":\"1.8.26\",\"matchCriteriaId\":\"D4B7DF92-891F-4E55-BE5D-759D8E68D501\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DEECE5FC-CACF-4496-A3E7-164736409252\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://packetstormsecurity.com/files/156174/Slackware-Security-Advisory-sudo-Updates.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third 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Advisory\"]}]}}",
   },
}


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