Veracode Vulnerability DatabaseVERACODE:26233Information Disclosure
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
Git is susceptible to information disclosure vulnerability whereby Git can be tricked into sending private credentials to a host controlled by an attacker. 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 contain an encoded newline can inject unintended values into the credential helper protocol stream, causing the credential helper to retrieve the password for one server (e.g., good.example.com) for an HTTP request being made to another server (e.g., evil.example.com), resulting in credentials for the former being sent to the latter. There are no restrictions on the relationship between the two, meaning that an attacker can craft a URL that will present stored credentials for any host to a host of their choosing. 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.
References
lists.opensuse.org/opensuse-security-announce/2020-04/msg00027.html
lists.opensuse.org/opensuse-security-announce/2020-05/msg00003.html
packetstormsecurity.com/files/157250/Git-Credential-Helper-Protocol-Newline-Injection.html
www.openwall.com/lists/oss-security/2020/04/15/5
www.openwall.com/lists/oss-security/2020/04/15/6
www.openwall.com/lists/oss-security/2020/04/20/1
github.com/git/git/commit/9a6bbee8006c24b46a85d29e7b38cfa79e9ab21b
github.com/git/git/security/advisories/GHSA-qm7j-c969-7j4q
lists.debian.org/debian-lts-announce/2020/04/msg00010.html
lists.fedoraproject.org/archives/list/[email protected]/message/74Q7WVJ6FKLIN62VS2JD2XCNWK5TNKOW/
lists.fedoraproject.org/archives/list/[email protected]/message/7TVS5UG6JD3MYIGSBKMIOS6AF7CR5IPI/
lists.fedoraproject.org/archives/list/[email protected]/message/MOCTR2SEHCPSCOVUQJAGFPGKFMI2VE6V/
lists.fedoraproject.org/archives/list/[email protected]/message/PN3FUOXKX3AXTULYV53ACABER2W2FSOU/
lists.fedoraproject.org/archives/list/[email protected]/message/XPCEOIFLLEF24L6GLVJVFZX4CREDEHDF/
lore.kernel.org/git/[email protected]/
security.gentoo.org/glsa/202004-13
support.apple.com/kb/HT211141
usn.ubuntu.com/4329-1/
www.debian.org/security/2020/dsa-4657
Related
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N