EUVD-2025-20679CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Lifecycle Timeline
4Description
Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals. The wincred credential helper uses a static buffer (target) as a unique key for storing and comparing against internal storage. This credential helper does not properly bounds check the available space remaining in the buffer before appending to it with wcsncat(), leading to potential buffer overflows. This vulnerability is fixed in v2.43.7, v2.44.4, v2.45.4, v2.46.4, v2.47.3, v2.48.2, v2.49.1, and v2.50.1.
Analysis
Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals. The wincred credential helper uses a static buffer (target) as a unique key for storing and comparing against internal storage. This credential helper does not properly bounds check the available space remaining in the buffer before appending to it with wcsncat(), leading to potential buffer overflows. This vulnerability is fixed in v2.43.7, v2.44.4, v2.45.4, v2.46.4, v2.47.3, v2.48.2, v2.49.1, and v2.50.1.
Technical Context
A buffer overflow occurs when data written to a buffer exceeds its allocated size, potentially overwriting adjacent memory and corrupting program state. This vulnerability is classified as Classic Buffer Overflow (CWE-120).
Remediation
Use memory-safe languages or bounds-checked functions. Enable ASLR, DEP/NX, and stack canaries. Apply vendor patches promptly.
Priority Score
Vendor Status
Ubuntu
Priority: Medium| Release | Status | Version |
|---|---|---|
| bionic | released | 1:2.17.1-1ubuntu0.18+esm2 |
| focal | released | 1:2.25.1-1ubuntu3.14+esm1 |
| jammy | released | 1:2.34.1-1ubuntu1.13 |
| noble | released | 1:2.43.0-1ubuntu7.3 |
| oracular | released | 1:2.45.2-1ubuntu1.2 |
| plucky | released | 1:2.48.1-0ubuntu1.1 |
| upstream | released | 2.43.7 |
| xenial | released | 1:2.7.4-0ubuntu1.10+esm9 |
Debian
| Release | Status | Fixed Version | Urgency |
|---|---|---|---|
| bullseye | fixed | 1:2.30.2-1+deb11u2 | - |
| bullseye (security) | fixed | 1:2.30.2-1+deb11u5 | - |
| bookworm | fixed | 1:2.39.5-0+deb12u3 | - |
| bookworm (security) | fixed | 1:2.39.5-0+deb12u2 | - |
| trixie | fixed | 1:2.47.3-0+deb13u1 | - |
| forky | fixed | 1:2.51.0-1 | - |
| sid | fixed | 1:2.53.0-1 | - |
| (unstable) | not-affected | - | - |
Share
External POC / Exploit Code
Leaving vuln.today