<p>Upgrade <code>Alpine:3.16</code> <code>git</code> to version 2.26.2-r0 or higher.</p>

Insufficiently Protected Credentials Affecting git package, versions <2.26.2-r0

Threat Intelligence

0.65% (80^th percentile)

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Snyk ID SNYK-ALPINE316-GIT-2842455
published 21 Jul 2020
disclosed 21 Apr 2020

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Introduced: 21 Apr 2020

CVE-2020-11008 Open this link in a new tab CWE-522 Open this link in a new tab CWE-20 Open this link in a new tab

How to fix?

Upgrade Alpine:3.16 git to version 2.26.2-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream git package and not the git package as distributed by Alpine. See How to fix? for Alpine:3.16 relevant fixed versions and status.

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.

References

CVSS Scores

version 3.1

Attack Vector (AV)

Network
Attack Complexity (AC)

Low
Privileges Required (PR)

None
User Interaction (UI)

None

Scope (S)

Unchanged

Confidentiality (C)

High
Integrity (I)

None
Availability (A)

None

Insufficiently Protected Credentials Affecting git package, versions <2.26.2-r0

Severity

Snyk's Security Team recommends NVD's CVSS assessment