Vulnerability Details : CVE-2023-29383

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.
Vulnerability category: Denial of service
Published 2023-04-14 22:15:08
Updated 2023-04-24 18:05:30
Source MITRE
View at NVD,

Exploit prediction scoring system (EPSS) score for CVE-2023-29383

Probability of exploitation activity in the next 30 days: 0.05%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 12 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2023-29383

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Source

CWE ids for CVE-2023-29383

References for CVE-2023-29383

Products affected by CVE-2023-29383

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