Test ID:	1.3.6.1.4.1.25623.1.1.2.2021.2525
Category:	Huawei EulerOS Local Security Checks
Title:	Huawei EulerOS: Security Advisory for git (EulerOS-SA-2021-2525)
Summary:	The remote host is missing an update for the Huawei EulerOS 'git' package(s) announced via the EulerOS-SA-2021-2525 advisory.
Description:	Summary: The remote host is missing an update for the Huawei EulerOS 'git' package(s) announced via the EulerOS-SA-2021-2525 advisory. Vulnerability Insight: 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.(CVE-2020-11008) 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 ... [Please see the references for more information on the vulnerabilities] Affected Software/OS: 'git' package(s) on Huawei EulerOS V2.0SP9. Solution: Please install the updated package(s). CVSS Score: 5.0 CVSS Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2020-5260 Debian Security Information: DSA-4657 (Google Search) https://www.debian.org/security/2020/dsa-4657 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/74Q7WVJ6FKLIN62VS2JD2XCNWK5TNKOW/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MOCTR2SEHCPSCOVUQJAGFPGKFMI2VE6V/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7TVS5UG6JD3MYIGSBKMIOS6AF7CR5IPI/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XPCEOIFLLEF24L6GLVJVFZX4CREDEHDF/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PN3FUOXKX3AXTULYV53ACABER2W2FSOU/ https://security.gentoo.org/glsa/202004-13 http://packetstormsecurity.com/files/157250/Git-Credential-Helper-Protocol-Newline-Injection.html https://github.com/git/git/commit/9a6bbee8006c24b46a85d29e7b38cfa79e9ab21b https://lore.kernel.org/git/xmqqy2qy7xn8.fsf@gitster.c.googlers.com/ https://lists.debian.org/debian-lts-announce/2020/04/msg00010.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 SuSE Security Announcement: openSUSE-SU-2020:0524 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00027.html SuSE Security Announcement: openSUSE-SU-2020:0598 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00003.html https://usn.ubuntu.com/4329-1/
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