CVE-2023-29383

Katalog CVE

CVSS 3.3 · Low EPSS 0,43%

Kerentanan Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') pada shadow project shadow. Skor CVSS 3.1 3.3 (Low) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

14 April 2023

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

3.3 (Low), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-125: Out-of-bounds Read

EPSS (30 hari)

0,43% peluang dieksploitasi; lebih tinggi dari 34,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/shadow-maint/shadow/commit/e5905c4b84d4fb90aefcd96ee618411ebfac663d patch
• https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/cve-2023-29383-abusing-linux-chfn-to-misrepres... exploit · advisory pihak ketiga
• https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=31797 exploit · advisory pihak ketiga
• https://github.com/shadow-maint/shadow/pull/687 issue tracking
• https://lists.debian.org/debian-lts-announce/2025/04/msg00026.html