| Summary: | <dev-vcs/git-{2.23.2,2.24.2,2.25.3}: crafted URL could leak credential information CVE-2020-5260 | ||
|---|---|---|---|
| Product: | Gentoo Security | Reporter: | Thomas Deutschmann (RETIRED) <whissi> |
| Component: | Vulnerabilities | Assignee: | Gentoo Security <security> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | polynomial-c, robbat2 |
| Priority: | Normal | Flags: | nattka:
sanity-check+
|
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | A4 [glsa+ cve] | ||
| Package list: |
dev-vcs/git-2.23.2 amd64 arm arm64 ppc ppc64 x86 hppa sparc s390
dev-vcs/git-2.24.2 amd64 arm arm64 ppc ppc64 x86 hppa sparc s390
dev-vcs/git-2.25.3 amd64 arm arm64 ppc ppc64 x86 hppa sparc s390
|
Runtime testing required: | Yes |
|
Description
Thomas Deutschmann (RETIRED)
2020-04-11 22:35:31 UTC
Whissi: ACK on the mail; will have releases out shortly after the upstream tarballs are available. Tarballs are now available and ebuilds are updated. Arches, please build with FEATURES=test and stabilize. Slow arches should prioritize 2.25.3 if build&test time is a concern. CVE-2020-5260: With a crafted URL that contains a newline in it, the credential helper machinery can be fooled to give credential information for a wrong host. The attack has been made impossible by forbidding a newline character in any value passed via the credential protocol. sparc stable amd64 stable arm stable x86 stable s390 stable ppc stable ppc64 stable reluctantly stable on arm64 due to bug 524430 CVE-2020-5260 (https://nvd.nist.gov/vuln/detail/CVE-2020-5260): Affected versions of Git have a 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. The problem has been patched in the versions published on April 14th, 2020, going back to v2.17.x. Anyone wishing to backport the change further can do so by applying commit 9a6bbee (the full release includes extra checks for git fsck, but that commit is sufficient to protect clients against the vulnerability). The patched versions are: 2.17.4, 2.18.3, 2.19.4, 2.20.3, 2.21.2, 2.22.3, 2.23.2, 2.24.2, 2.25.3, 2.26.1. hppa stable @maintainer(s), please cleanup Added to an existing GLSA request. This issue was resolved and addressed in GLSA 202004-13 at https://security.gentoo.org/glsa/202004-13 by GLSA coordinator Thomas Deutschmann (whissi). |
