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WS-2023-0076
Date: March 15, 2023
A stack-based buffer overflow was discovered in OpenBSD's libskey. In the file skeylogin.c, "pbuf - p" at lines 439 and 440 should be "p - pbuf", so the "pbuf - p < 4" test at line 439 always succeeds and the strncpy() at line 440 may overflow pbuf (if 2 * (p - pbuf) + 4 > 255 + 1, i.e. if the hostname is longer than 126 characters).
Language: C
Severity Score
Severity Score
Weakness Type (CWE)
Stack-based Buffer Overflow
CWE-121CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | NONE |
| Integrity (I): | NONE |
| Availability (A): | HIGH |