CVE-2020-11008
Vulnerability from cvelistv5
Published
2020-04-21 18:40
Modified
2024-08-04 11:21
Severity ?
4.0 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
Summary
Affected versions of Git have a vulnerability whereby Git can be tricked into sending private credentials to a host controlled by an attacker. This bug is similar to CVE-2020-5260(GHSA-qm7j-c969-7j4q). The fix for that bug still left the door open for an exploit where _some_ credential is leaked (but the attacker cannot control which one). Git uses external "credential helper" programs to store and retrieve passwords or other credentials from secure storage provided by the operating system. Specially-crafted URLs that are considered illegal as of the recently published Git versions can cause Git to send a "blank" pattern to helpers, missing hostname and protocol fields. Many helpers will interpret this as matching _any_ URL, and will return some unspecified stored password, leaking the password to an attacker's server. The vulnerability can be triggered by feeding a malicious URL to `git clone`. However, the affected URLs look rather suspicious; the likely vector would be through systems which automatically clone URLs not visible to the user, such as Git submodules, or package systems built around Git. The root of the problem is in Git itself, which should not be feeding blank input to helpers. However, the ability to exploit the vulnerability in practice depends on which helpers are in use. Credential helpers which are known to trigger the vulnerability: - Git's "store" helper - Git's "cache" helper - the "osxkeychain" helper that ships in Git's "contrib" directory Credential helpers which are known to be safe even with vulnerable versions of Git: - Git Credential Manager for Windows Any helper not in this list should be assumed to trigger the vulnerability.
References
security-advisories@github.comhttp://lists.opensuse.org/opensuse-security-announce/2020-05/msg00003.html
security-advisories@github.comhttp://seclists.org/fulldisclosure/2020/May/41
security-advisories@github.comhttps://github.com/git/git/commit/c44088ecc4b0722636e0a305f9608d3047197282Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/git/git/security/advisories/GHSA-hjc9-x69f-jqj7Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/git/git/security/advisories/GHSA-qm7j-c969-7j4qMitigation, Patch, Third Party Advisory
security-advisories@github.comhttps://lists.debian.org/debian-lts-announce/2020/04/msg00015.htmlMailing List, Third Party Advisory
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/74Q7WVJ6FKLIN62VS2JD2XCNWK5TNKOW/
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MOCTR2SEHCPSCOVUQJAGFPGKFMI2VE6V/
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PN3FUOXKX3AXTULYV53ACABER2W2FSOU/
security-advisories@github.comhttps://security.gentoo.org/glsa/202004-13Third Party Advisory
security-advisories@github.comhttps://support.apple.com/kb/HT211183
security-advisories@github.comhttps://usn.ubuntu.com/4334-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00003.html
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2020/May/41
af854a3a-2127-422b-91ae-364da2661108https://github.com/git/git/commit/c44088ecc4b0722636e0a305f9608d3047197282Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/git/git/security/advisories/GHSA-hjc9-x69f-jqj7Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/git/git/security/advisories/GHSA-qm7j-c969-7j4qMitigation, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/04/msg00015.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/74Q7WVJ6FKLIN62VS2JD2XCNWK5TNKOW/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MOCTR2SEHCPSCOVUQJAGFPGKFMI2VE6V/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PN3FUOXKX3AXTULYV53ACABER2W2FSOU/
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202004-13Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT211183
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4334-1/Third Party Advisory
Impacted products
Vendor Product Version
Show details on NVD website

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    "nvd": "{\"cve\":{\"id\":\"CVE-2020-11008\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2020-04-21T19:15:13.457\",\"lastModified\":\"2024-11-21T04:56:34.263\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Affected versions of Git have a vulnerability whereby Git can be tricked into sending private credentials to a host controlled by an attacker. This bug is similar to CVE-2020-5260(GHSA-qm7j-c969-7j4q). The fix for that bug still left the door open for an exploit where _some_ credential is leaked (but the attacker cannot control which one). Git uses external \\\"credential helper\\\" programs to store and retrieve passwords or other credentials from secure storage provided by the operating system. Specially-crafted URLs that are considered illegal as of the recently published Git versions can cause Git to send a \\\"blank\\\" pattern to helpers, missing hostname and protocol fields. Many helpers will interpret this as matching _any_ URL, and will return some unspecified stored password, leaking the password to an attacker\u0027s server. The vulnerability can be triggered by feeding a malicious URL to `git clone`. However, the affected URLs look rather suspicious; the likely vector would be through systems which automatically clone URLs not visible to the user, such as Git submodules, or package systems built around Git. The root of the problem is in Git itself, which should not be feeding blank input to helpers. However, the ability to exploit the vulnerability in practice depends on which helpers are in use. Credential helpers which are known to trigger the vulnerability: - Git\u0027s \\\"store\\\" helper - Git\u0027s \\\"cache\\\" helper - the \\\"osxkeychain\\\" helper that ships in Git\u0027s \\\"contrib\\\" directory Credential helpers which are known to be safe even with vulnerable versions of Git: - Git Credential Manager for Windows Any helper not in this list should be assumed to trigger the vulnerability.\"},{\"lang\":\"es\",\"value\":\"Las versiones afectadas de Git tienen una vulnerabilidad por la que Git puede ser enga\u00f1ado para que env\u00ede credenciales privadas a un host controlado por un atacante. Este fallo es similar al CVE-2020-5260 (GHSA-qm7j-c969-7j4q). La correcci\u00f3n de ese bug todav\u00eda deja la puerta abierta para una explotaci\u00f3n donde se filtra la credencial de _some_ (pero el atacante no puede controlar cu\u00e1l). Git utiliza programas externos de \\\"credential helper\\\" para almacenar y recuperar contrase\u00f1as u otras credenciales desde el almacenamiento seguro proporcionado por el sistema operativo. Las URLs especialmente dise\u00f1adas que se consideran ilegales a partir de las versiones de Git recientemente publicadas pueden hacer que Git env\u00ede un patr\u00f3n \\\"blank\\\" a los asistentes, faltando los campos hostname y protocol. Muchos asistentes interpretar\u00e1n esto como una coincidencia con la URL _any_, y devolver\u00e1n alguna contrase\u00f1a almacenada sin especificar, filtrando la contrase\u00f1a hacia el servidor de un atacante. La vulnerabilidad puede ser desencadenada alimentando una URL maliciosa a \\\"git clone\\\". Sin embargo, las URLs afectadas parecen bastante sospechosas; el vector probable ser\u00eda por medio de sistemas que clonan autom\u00e1ticamente las URLs no visibles para el usuario, tales como los subm\u00f3dulos de Git, o sistemas de paquetes construidos alrededor de Git. La ra\u00edz del problema est\u00e1 en el propio Git, que no deber\u00eda estar alimentando con entradas en blanco a los asistentes. Sin embargo, la capacidad de explotar la vulnerabilidad en la pr\u00e1ctica depende de los asistentes que se utilicen. Los asistentes con credenciales que se sabe que desencadenan la vulnerabilidad: - El asistente \\\"store\\\" de Git - El asistente \\\"cache\\\" de Git - El asistente \\\"osxkeychain\\\" que se incluye en los asistentes de Credenciales del directorio \\\"contrib\\\" de Git que se conoce que son seguros incluso con versiones vulnerables de Git: - Cualquier asistente de Git Credential Manager para Windows que no est\u00e9 en esta lista, se debe asumir que desencadena la 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\"references\":[{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00003.html\",\"source\":\"security-advisories@github.com\"},{\"url\":\"http://seclists.org/fulldisclosure/2020/May/41\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/git/git/commit/c44088ecc4b0722636e0a305f9608d3047197282\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/git/git/security/advisories/GHSA-hjc9-x69f-jqj7\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/git/git/security/advisories/GHSA-qm7j-c969-7j4q\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Mitigation\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2020/04/msg00015.html\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/74Q7WVJ6FKLIN62VS2JD2XCNWK5TNKOW/\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MOCTR2SEHCPSCOVUQJAGFPGKFMI2VE6V/\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PN3FUOXKX3AXTULYV53ACABER2W2FSOU/\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://security.gentoo.org/glsa/202004-13\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://support.apple.com/kb/HT211183\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://usn.ubuntu.com/4334-1/\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00003.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://seclists.org/fulldisclosure/2020/May/41\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://github.com/git/git/commit/c44088ecc4b0722636e0a305f9608d3047197282\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/git/git/security/advisories/GHSA-hjc9-x69f-jqj7\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/git/git/security/advisories/GHSA-qm7j-c969-7j4q\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mitigation\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2020/04/msg00015.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/74Q7WVJ6FKLIN62VS2JD2XCNWK5TNKOW/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MOCTR2SEHCPSCOVUQJAGFPGKFMI2VE6V/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PN3FUOXKX3AXTULYV53ACABER2W2FSOU/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.gentoo.org/glsa/202004-13\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://support.apple.com/kb/HT211183\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://usn.ubuntu.com/4334-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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