CVE-2020-5260

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Summary

CVECVE-2020-5260
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-04-14 23:15:00 UTC
Updated2023-11-07 03:23:00 UTC
DescriptionAffected 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.

Risk And Classification

Problem Types: CWE-522

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Canonical Ubuntu Linux 16.04 All All All
Operating System Canonical Ubuntu Linux 18.04 All All All
Operating System Canonical Ubuntu Linux 19.10 All All All
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 8.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 8.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Fedoraproject Fedora 30 All All All
Operating System Fedoraproject Fedora 31 All All All
Operating System Fedoraproject Fedora 32 All All All
Application Git Git All All All All
Application Git Git All All All All
Application Git-scm Git All All All All
Application Git-scm Git All All All All
Operating System Opensuse Leap 15.1 All All All

References

ReferenceSourceLinkTags
credential: avoid writing values with newlines · git/git@9a6bbee · GitHub MISC github.com Patch, Third Party Advisory
[SECURITY] Fedora 32 Update: git-2.26.2-1.fc32 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Third Party Advisory
[SECURITY] Fedora 32 Update: git-2.26.1-1.fc32 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Third Party Advisory
[SECURITY] Fedora 30 Update: git-2.21.3-1.fc30 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[security-announce] openSUSE-SU-2020:0524-1: important: Security update SUSE lists.opensuse.org Third Party Advisory
oss-security - Re: CVE-2020-5260: Git: malicious URLs may cause Git to present stored credentials to the wrong server MLIST www.openwall.com Mailing List, Third Party Advisory
[security-announce] openSUSE-SU-2020:0598-1: moderate: Security update f SUSE lists.opensuse.org Third Party Advisory
oss-security - CVE-2020-5260: Git: malicious URLs may cause Git to present stored credentials to the wrong server MLIST www.openwall.com Mailing List
[SECURITY] Fedora 31 Update: git-2.25.3-1.fc31 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
oss-security - CVE-2020-11008: Git: Malicious URLs can still cause Git to send a stored credential to the wrong server MLIST www.openwall.com Mailing List, Third Party Advisory
[SECURITY] Fedora 31 Update: git-2.25.4-1.fc31 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 31 Update: git-2.25.4-1.fc31 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Third Party Advisory
[SECURITY] Fedora 31 Update: git-2.25.3-1.fc31 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Third Party Advisory
Git: Information disclosure (GLSA 202004-13) — Gentoo security GENTOO security.gentoo.org Third Party Advisory
[Announce] Git v2.26.1 and others - Junio C Hamano MISC lore.kernel.org Mailing List, Third Party Advisory
About the security content of Xcode 11.4.1 - Apple Support CONFIRM support.apple.com Third Party Advisory
[SECURITY] Fedora 32 Update: git-2.26.2-1.fc32 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 30 Update: git-2.21.3-1.fc30 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Third Party Advisory
[SECURITY] Fedora 32 Update: git-2.26.1-1.fc32 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
USN-4329-1: Git vulnerability | Ubuntu security notices | Ubuntu UBUNTU usn.ubuntu.com Third Party Advisory
[SECURITY] [DLA 2177-1] git security update MLIST lists.debian.org Mailing List, Third Party Advisory
malicious URLs may cause Git to present stored credentials to the wrong server · Advisory · git/git · GitHub CONFIRM github.com Mitigation, Patch, Third Party Advisory
Git Credential Helper Protocol Newline Injection ≈ Packet Storm MISC packetstormsecurity.com Third Party Advisory, VDB Entry
Debian -- Security Information -- DSA-4657-1 git DEBIAN www.debian.org Third Party Advisory
[Announce] Git v2.26.1 and others - Junio C Hamano lore.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 296073 Oracle Solaris 11.4 Support Repository Update (SRU) 24.75.2 Missing (CPUJUL2020)
  • 375977 Sourcetree for macOS and Windows Git Credential Disclosure Vulnerability
  • 377091 Alibaba Cloud Linux Security Update for git (ALINUX3-SA-2022:0109)
  • 377173 Alibaba Cloud Linux Security Update for git (ALINUX2-SA-2020:0088)
  • 500220 Alpine Linux Security Update for git
  • 503964 Alpine Linux Security Update for git
  • 670767 EulerOS Security Update for git (EulerOS-SA-2021-2525)
  • 670791 EulerOS Security Update for git (EulerOS-SA-2021-2549)
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