CVE Explorer
CVE-2025-71263
In UNIX Fourth Research Edition (v4), the su command is vulnerable to a buffer overflow due to the 'password' variable having a fixed size of 100 bytes. A local user can exploit this to gain root privileges. It is unlikely that UNIX v4 is running anywhere outside of a very small number of lab environments. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unknown","product":"UNIX","vendor":"AT&T Bell Labs","versions":[{"status":"affected","version":"4","versionType":"custom"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:35db4e0edc267c813d802866c8e09b3961a1ab18bfd1f8a3d75f97f431fbe5e0 · sha256:8e04d721f45a3bf2… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:35db4e0edc267c813d802866c8e09b3961a1ab18bfd1f8a3d75f97f431fbe5e0 · sha256:8e04d721f45a3bf2… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-120","description":"CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:35db4e0edc267c813d802866c8e09b3961a1ab18bfd1f8a3d75f97f431fbe5e0 · sha256:8e04d721f45a3bf2… · /containers/cna/problemTypes/0/descriptions/0
Source references
6 source assertions{"url":"http://www.openwall.com/lists/oss-security/2026/03/20/6"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:35db4e0edc267c813d802866c8e09b3961a1ab18bfd1f8a3d75f97f431fbe5e0 · sha256:8e04d721f45a3bf2… · /containers/adp/1/references/0
{"url":"http://www.openwall.com/lists/oss-security/2026/03/21/4"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:35db4e0edc267c813d802866c8e09b3961a1ab18bfd1f8a3d75f97f431fbe5e0 · sha256:8e04d721f45a3bf2… · /containers/adp/1/references/1
{"url":"https://discuss.systems/@ricci/115747843169814700"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:35db4e0edc267c813d802866c8e09b3961a1ab18bfd1f8a3d75f97f431fbe5e0 · sha256:8e04d721f45a3bf2… · /containers/cna/references/2
{"url":"https://sigma-star.at/blog/2025/12/unix-v4-buffer-overflow/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:35db4e0edc267c813d802866c8e09b3961a1ab18bfd1f8a3d75f97f431fbe5e0 · sha256:8e04d721f45a3bf2… · /containers/cna/references/0
{"url":"https://www.spinellis.gr/blog/20251223/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:35db4e0edc267c813d802866c8e09b3961a1ab18bfd1f8a3d75f97f431fbe5e0 · sha256:8e04d721f45a3bf2… · /containers/cna/references/3
{"url":"https://www.tuhs.org/pipermail/tuhs/2026-January/032991.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:35db4e0edc267c813d802866c8e09b3961a1ab18bfd1f8a3d75f97f431fbe5e0 · sha256:8e04d721f45a3bf2… · /containers/cna/references/1
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.