CVE-2026-27459: Pyopenssl Dtls Cookie Callback Buffer Overflow
The DTLS cookie-generate callback wrapper copies the callback-returned cookie bytes into the fixed-size OpenSSL `out` buffer via `out[0:len(cookie)] = cookie` without first bounding the cookie length against DTLS1_COOKIE_LENGTH (255). A callback returning more than 255 bytes overflows the OpenSSL-provided buffer (CVE-2026-27459, CWE-120). Add `if len(cookie)
Pythongreprules fetch cve-2026-27459-pyopenssl-dtls-cookie-callback-buffer-overflow --engine opengrepDescription
The DTLS cookie-generate callback wrapper copies the callback-returned cookie bytes into the fixed-size OpenSSL `out` buffer via `out[0:len(cookie)] = cookie` without first bounding the cookie length against DTLS1_COOKIE_LENGTH (255). A callback returning more than 255 bytes overflows the OpenSSL-provided buffer (CVE-2026-27459, CWE-120). Add `if len(cookie)
Community feedback
0 rule-level signals from signed-in users.
- Useful reports
- 0
- Context false positives
- 0
- Metadata suggestions
- 0
Contextual precision
Aggregated from approved scan feedback. False-positive reports describe observed scan contexts, not a global rule verdict.
- Findings observed
- 0
- Projects
- 0
- Reporters
- 0
Precision details are collecting more signed-in reports before verdict counts or ratios are emphasized.
No approved finding verdicts yet.
No scan diagnostics reported yet.