CVE-2023-29383
Published Apr 14, 2023
Last updated 2 years ago
Overview
- Description
- 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.
- Source
- cve@mitre.org
- NVD status
- Analyzed
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 3.3
- Impact score
- 1.4
- Exploitability score
- 1.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Severity
- LOW
Weaknesses
- nvd@nist.gov
- CWE-74
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:shadow_project:shadow:4.13:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "79B0C1D0-9CF5-451D-B3B3-750B64FD7575"
}
],
"operator": "OR"
}
]
}
]