Code injection in Shadow
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2023-29383 |
| CWE-ID | CWE-74 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
shadow Universal components / Libraries / Libraries used by multiple products |
| Vendor | Mark Florian |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Improper Neutralization of Special Elements in Output Used by a Downstream Component
EUVDB-ID: #VU75589
Risk: Low
CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-29383
Exploit availability: No
DescriptionThe vulnerability allows a local user to inject arbitrary code.
The vulnerability exists due to an input validation error when processing fields provided to the SUID program chfn (change finger). A local user can inject and execute arbitrary code or misrepresent existing files.
Install updates from vendor's website.
Vulnerable software versionsshadow: 4.0.0 - 4.13
External linkshttp://github.com/shadow-maint/shadow/commit/e5905c4b84d4fb90aefcd96ee618411ebfac663d
http://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=31797
http://github.com/shadow-maint/shadow/pull/687
http://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/cve-2023-29383-abusing-linux-chfn-to-misrepresent-etc-passwd/
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
