CVE-2023-29383
shadow - security update
描述
In Shadow 4.13, it is possible to inject control characters into fields provided to the SUID program chfn (change finger). Although it is not possible to exploit this directly (e.g., adding a new user fails because \n is in the block list), it is possible to misrepresent the /etc/passwd file when viewed. Use of \r manipulations and Unicode characters to work around blocking of the : character make it possible to give the impression that a new user has been added. In other words, an adversary may be able to convince a system administrator to take the system offline (an indirect, social-engineered denial of service) by demonstrating that "cat /etc/passwd" shows a rogue user account.
如何修補 CVE-2023-29383
要修補 CVE-2023-29383,請將受影響套件升級到下列已修補版本。
- —升級至 1:4.8.1-1+deb11u1 或更新版本
- —升級至 1:4.8.1-1+deb11u1 或更新版本
CVE-2023-29383 正在被利用嗎?
低 — EPSS 為 0.0%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 1:4.8.1-1+deb11u1
- from 0, < 1:4.8.1-1+deb11u1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |