#VU27258 Insufficiently protected credentials in Git


Published: 2020-06-03

Vulnerability identifier: #VU27258

Vulnerability risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-5260

CWE-ID: CWE-522

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Git
Client/Desktop applications / Software for system administration

Vendor: Git

Description

The vulnerability allows a remote attacker to gain access to sensitive information on the system.

The vulnerability exists due to the Git can be tricked into sending private credentials to a host controlled by an attacker. A remote attacker can send a specially crafted URL to "git clone" that will present stored credentials for any host to a host of their choosing.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Git: 2.17.0 - 2.17.3, 2.18.0 - 2.18.2, 2.19.0 - 2.19.3, 2.20.0 - 2.20.2, 2.21.0 - 2.21.1, 2.22.0 - 2.22.2, 2.23.0 - 2.23.1, 2.24.0 - 2.24.1, 2.25.0 - 2.25.2, 2.26.0


External links
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00027.html
http://packetstormsecurity.com/files/157250/Git-Credential-Helper-Protocol-Newline-Injection.html
http://www.openwall.com/lists/oss-security/2020/04/15/5
http://www.openwall.com/lists/oss-security/2020/04/15/6
http://www.openwall.com/lists/oss-security/2020/04/20/1
http://github.com/git/git/commit/9a6bbee8006c24b46a85d29e7b38cfa79e9ab21b
http://github.com/git/git/security/advisories/GHSA-qm7j-c969-7j4q
http://lists.debian.org/debian-lts-announce/2020/04/msg00010.html
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XPCEOIFLLEF24L6GLVJVFZX4CREDEHDF/
http://lore.kernel.org/git/xmqqy2qy7xn8.fsf@gitster.c.googlers.com/
http://support.apple.com/kb/HT211141
http://www.debian.org/security/2020/dsa-4657


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.


Latest bulletins with this vulnerability