CVE-2021-31535
Vulnerability from cvelistv5
Published
2021-05-27 12:26
Modified
2024-08-03 23:03
Severity ?
Summary
LookupCol.c in X.Org X through X11R7.7 and libX11 before 1.7.1 might allow remote attackers to execute arbitrary code. The libX11 XLookupColor request (intended for server-side color lookup) contains a flaw allowing a client to send color-name requests with a name longer than the maximum size allowed by the protocol (and also longer than the maximum packet size for normal-sized packets). The user-controlled data exceeding the maximum size is then interpreted by the server as additional X protocol requests and executed, e.g., to disable X server authorization completely. For example, if the victim encounters malicious terminal control sequences for color codes, then the attacker may be able to take full control of the running graphical session.
References
cve@mitre.orghttp://packetstormsecurity.com/files/162737/libX11-Insufficient-Length-Check-Injection.htmlExploit, Third Party Advisory, VDB Entry
cve@mitre.orghttp://seclists.org/fulldisclosure/2021/May/52Mailing List, Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2021/05/18/2Mailing List, Third Party Advisory
cve@mitre.orghttps://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/8d2e02ae650f00c4a53deb625211a0527126c605Third Party Advisory
cve@mitre.orghttps://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cdev.kafka.apache.org%3E
cve@mitre.orghttps://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cusers.kafka.apache.org%3E
cve@mitre.orghttps://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cdev.kafka.apache.org%3E
cve@mitre.orghttps://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cusers.kafka.apache.org%3E
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2021/05/msg00021.htmlThird Party Advisory
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEOT4RLB76RVPJQKGGTIKTBIOLHX2NR6/
cve@mitre.orghttps://lists.freedesktop.org/archives/xorg/Third Party Advisory
cve@mitre.orghttps://lists.x.org/archives/xorg-announce/2021-May/003088.htmlVendor Advisory
cve@mitre.orghttps://security.gentoo.org/glsa/202105-16Third Party Advisory
cve@mitre.orghttps://security.netapp.com/advisory/ntap-20210813-0001/Third Party Advisory
cve@mitre.orghttps://unparalleled.eu/blog/2021/20210518-using-xterm-to-navigate-the-huge-color-space/Exploit, Third Party Advisory
cve@mitre.orghttps://unparalleled.eu/publications/2021/advisory-unpar-2021-1.txtExploit, Third Party Advisory
cve@mitre.orghttps://www.debian.org/security/2021/dsa-4920Third Party Advisory
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2021/05/18/2Mailing List, Third Party Advisory
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2021/05/18/3Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/162737/libX11-Insufficient-Length-Check-Injection.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2021/May/52Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/05/18/2Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/8d2e02ae650f00c4a53deb625211a0527126c605Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cdev.kafka.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cusers.kafka.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cdev.kafka.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cusers.kafka.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/05/msg00021.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEOT4RLB76RVPJQKGGTIKTBIOLHX2NR6/
af854a3a-2127-422b-91ae-364da2661108https://lists.freedesktop.org/archives/xorg/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.x.org/archives/xorg-announce/2021-May/003088.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202105-16Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210813-0001/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://unparalleled.eu/blog/2021/20210518-using-xterm-to-navigate-the-huge-color-space/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://unparalleled.eu/publications/2021/advisory-unpar-2021-1.txtExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2021/dsa-4920Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2021/05/18/2Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2021/05/18/3Mailing List, Third Party Advisory
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

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                     url: "https://security.netapp.com/advisory/ntap-20210813-0001/",
                  },
                  {
                     name: "FEDORA-2021-62bb9998b2",
                     refsource: "FEDORA",
                     url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TEOT4RLB76RVPJQKGGTIKTBIOLHX2NR6/",
                  },
                  {
                     name: "[kafka-dev] 20210831 Security vulnerabilities in kafka:2.13-2.6.0/2.7.0 docker image",
                     refsource: "MLIST",
                     url: "https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc@%3Cdev.kafka.apache.org%3E",
                  },
                  {
                     name: "[kafka-users] 20210831 Security vulnerabilities in kafka:2.13-2.6.0/2.7.0 docker image",
                     refsource: "MLIST",
                     url: "https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc@%3Cusers.kafka.apache.org%3E",
                  },
                  {
                     name: "[kafka-users] 20210901 Re: [EXTERNAL] Re: Security vulnerabilities in kafka:2.13-2.6.0/2.7.0 docker image",
                     refsource: "MLIST",
                     url: "https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7@%3Cusers.kafka.apache.org%3E",
                  },
                  {
                     name: "[kafka-dev] 20210901 Re: [EXTERNAL] Re: Security vulnerabilities in kafka:2.13-2.6.0/2.7.0 docker image",
                     refsource: "MLIST",
                     url: "https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7@%3Cdev.kafka.apache.org%3E",
                  },
               ],
            },
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
      assignerShortName: "mitre",
      cveId: "CVE-2021-31535",
      datePublished: "2021-05-27T12:26:26",
      dateReserved: "2021-04-21T00:00:00",
      dateUpdated: "2024-08-03T23:03:33.270Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2021-31535\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2021-05-27T13:15:08.240\",\"lastModified\":\"2024-11-21T06:05:51.990\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"LookupCol.c in X.Org X through X11R7.7 and libX11 before 1.7.1 might allow remote attackers to execute arbitrary code. The libX11 XLookupColor request (intended for server-side color lookup) contains a flaw allowing a client to send color-name requests with a name longer than the maximum size allowed by the protocol (and also longer than the maximum packet size for normal-sized packets). The user-controlled data exceeding the maximum size is then interpreted by the server as additional X protocol requests and executed, e.g., to disable X server authorization completely. For example, if the victim encounters malicious terminal control sequences for color codes, then the attacker may be able to take full control of the running graphical session.\"},{\"lang\":\"es\",\"value\":\"El archivo LookupCol.c en X.Org X versiones hasta X11R7.7 y libX11 versiones anteriores a 1.7.1, podría permitir que atacantes remotos ejecuten código arbitrario. La peticiones XLookupColor de libX11 (destinada a la búsqueda de color del lado del servidor) contiene un fallo que permite a un cliente enviar peticiones de nombre de color con un nombre más largo que el tamaño máximo permitido por el protocolo (y también más largo que el tamaño máximo de paquete para tamaño normal de paquetes). Los datos controlados por el usuario que exceden el tamaño máximo son luego interpretados por el servidor como peticiones de protocolo X adicionales y ejecutados, por ejemplo, para deshabilitar completamente la autorización del servidor X. Por ejemplo, si la víctima encuentra secuencias de control de terminal maliciosas para códigos de color, entonces el atacante puede tomar el control total de la sesión gráfica en 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   },
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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