CVE-2023-4759 - Improper Link Resolution Before File Access ('Link Following')

Severity

88%

Complexity

27%

Confidentiality

98%

CVSS 3.1 Base Score 8.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Demo Examples

Improper Handling of Case Sensitivity

CWE-178

In the following example, an XSS neutralization method replaces script tags in user supplied input with a safe equivalent:


               
}
return input.replaceAll("script", mask);

The code only works when the "script" tag is in all lower-case, forming an incomplete blacklist (CWE-184). Equivalent tags such as "SCRIPT" or "ScRiPt" will not be neutralized by this method, allowing an XSS attack.

Overview

First reported 1 year ago

2023-09-12 10:15:00

Last updated 1 year ago

2023-11-15 19:35:00

Affected Software

Eclipse JGit

References

https://projects.eclipse.org/projects/technology.jgit/releases/6.6.1

https://git.eclipse.org/c/jgit/jgit.git/commit/?id=9072103f3b3cf64dd12ad2949836ab98f62dabf1

https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/11

https://projects.eclipse.org/projects/technology.jgit/releases/6.6.1

Release Notes, Vendor Advisory

https://git.eclipse.org/c/jgit/jgit.git/commit/?id=9072103f3b3cf64dd12ad2949836ab98f62dabf1

Patch, Vendor Advisory

https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/11

Issue Tracking, Vendor Advisory

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