CVE-2025-71263
HIGH
7,4
Source: [email protected]
Attack Vector: local
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Description
AI Translation Available
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.
EPSS (Exploit Prediction Scoring System)
Trend Analysis
EPSS (Exploit Prediction Scoring System)
Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.
EPSS Score
0,0001
Percentile
0,0th
Updated
EPSS Score Trend (Last 4 Days)
120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
IncompleteCommon Consequences
Security Scopes Affected:
Integrity
Confidentiality
Availability
Potential Impacts:
Modify Memory
Execute Unauthorized Code Or Commands
Dos: Crash, Exit, Or Restart
Dos: Resource Consumption (Cpu)
Applicable Platforms
Languages:
Assembly, C, C++, Memory-Unsafe
https://discuss.systems/@ricci/115747843169814700
https://sigma-star.at/blog/2025/12/unix-v4-buffer-overflow/
https://www.spinellis.gr/blog/20251223/
https://www.tuhs.org/pipermail/tuhs/2026-January/032991.html