CVE - CVE-2020-11008

CVE-ID
CVE-2020-11008	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/git/git/security/advisories/GHSA-hjc9-x69f-jqj7 CONFIRM:https://support.apple.com/kb/HT211183 FEDORA:FEDORA-2020-4e093619bb URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/74Q7WVJ6FKLIN62VS2JD2XCNWK5TNKOW/ FEDORA:FEDORA-2020-b2a2c830cf URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MOCTR2SEHCPSCOVUQJAGFPGKFMI2VE6V/ FEDORA:FEDORA-2020-f6b3b6fb18 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PN3FUOXKX3AXTULYV53ACABER2W2FSOU/ FULLDISC:20200522 APPLE-SA-2020-05-20-1 Xcode 11.5 URL:http://seclists.org/fulldisclosure/2020/May/41 GENTOO:GLSA-202004-13 URL:https://security.gentoo.org/glsa/202004-13 MISC:https://github.com/git/git/commit/c44088ecc4b0722636e0a305f9608d3047197282 MISC:https://github.com/git/git/security/advisories/GHSA-qm7j-c969-7j4q MLIST:[debian-lts-announce] 20200424 [SECURITY] [DLA 2182-1] git security update URL:https://lists.debian.org/debian-lts-announce/2020/04/msg00015.html SUSE:openSUSE-SU-2020:0598 URL:http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00003.html UBUNTU:USN-4334-1 URL:https://usn.ubuntu.com/4334-1/
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20200330	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20200330)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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