Informazioni sul CVE-2023-25815
Git looks for localized messages in the wrong place
CWE ID: CWE-22
Base Score (CVSS): N/A
CVE: CVE-2023-25815
Descrizione: In Git for Windows, the Windows port of Git, no localized messages are shipped with the installer. As a consequence, Git is expected not to localize messages at all, and skips the gettext initialization. However, due to a change in MINGW-packages, the `gettext()` function’s implicit initialization no longer uses the runtime prefix but uses the hard-coded path `C:\mingw64\share\locale` to look for localized messages. And since any authenticated user has the permission to create folders in `C:\` (and since `C:\mingw64` does not typically exist), it is possible for low-privilege users to place fake messages in that location where `git.exe` will pick them up in version 2.40.1. This vulnerability is relatively hard to exploit and requires social engineering. For example, a legitimate message at the end of a clone could be maliciously modified to ask the user to direct their web browser to a malicious website, and the user might think that the message comes from Git and is legitimate. It does require local write access by the attacker, though, which makes this attack vector less likely. Version 2.40.1 contains a patch for this issue. Some workarounds are available. Do not work on a Windows machine with shared accounts, or alternatively create a `C:\mingw64` folder and leave it empty. Users who have administrative rights may remove the permission to create folders in `C:\`.
Vettore di attacco CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L
Punteggio CVSS
Il CVSS è un sistema di valutazione che misura la gravità di una vulnerabilità informatica considerando fattori come l’impatto potenziale, la probabilità di attacco e la facilità di esecuzione.
Riassunto: Accesso: Local, Privilegi: Low, Interazione utente: Required, Confidenzialità: None, Integrità: Low, Disponibilità: Low.
Dettaglio del Vettore
| Metrica | Valore | Significato | Descrizione |
|---|---|---|---|
| Attack Vector (AV) | L | Local | L’attaccante deve avere accesso locale al sistema. |
| Attack Complexity (AC) | H | High | L’attacco richiede condizioni particolari o avanzate. |
| Privileges Required (PR) | L | Low | Richiede pochi privilegi. |
| User Interaction (UI) | R | Required | È richiesta l’interazione di un utente. |
| Scope (S) | U | Unchanged | Il raggio d’azione non cambia. |
| Confidentiality Impact (C) | N | None | Nessun impatto sulla riservatezza. |
| Integrity Impact (I) | L | Low | Impatto limitato. |
| Availability Impact (A) | L | Low | Interferenza limitata. |
Riferimenti esterni
- https://github.com/git-for-windows/git/security/advisories/GHSA-9w66-8mq8-5vm8
- https://github.com/msys2/MINGW-packages/pull/10461
- https://axcheron.github.io/exploit-101-format-strings/#writing-to-the-stack
- https://github.com/git-for-windows/git/releases/tag/v2.40.1.windows.1
- https://pubs.opengroup.org/onlinepubs/9699919799/functions/printf.html
- http://www.openwall.com/lists/oss-security/2023/04/25/2
- https://lists.fedoraproject.org/archives/list/[email protected]/message/PI7FZ4NNR5S5J5K6AMVQBH2JFP6NE4L7/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/YFZWGQKB6MM5MNF2DLFTD7KS2KWPICKL/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/RKOXOAZ42HLXHXTW6JZI4L5DAIYDTYCU/
- https://security.gentoo.org/glsa/202312-15
- https://lists.debian.org/debian-lts-announce/2024/06/msg00018.html
Prodotti interessati
- git-for-windows – git
Relazioni con altri prodotti
Produttore:git-for-windows
Prodotto: git
Anno: 2023
CWE: CWE-22
CVSS: 0.0