CVE-2023-29383

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.42% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 36.6% of scored records. A rank, not a probability.

NVD base score

3.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-10-14.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2023-04-14 00:00Z3 YR AGO

Last updated

2026-10-14 22:55Z14 DAYS AGO

Reserved

2023-04-05

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

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

Data version

5.2

Document digest

271b824e32f97f4a40a8a965637e358c64726606abcc470c0d635c8a30756c85

• github.comhttps://github.com/shadow-maint/shadow/pull/687
• github.comhttps://github.com/shadow-maint/shadow/commit/e5905c4b84d4fb90aefcd96ee618411ebfac663d
• www.trustwave.comhttps://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=31797
• www.trustwave.comhttps://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/cve-2023-29383-abusing-linux-chfn-to-misrepresent-etc-passwd/
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/04/msg00026.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-202008.html