Tlsfuzzer Ecdsa vulnerabilities
2 vulnerabilities
Known vulnerabilities in Tlsfuzzer Ecdsa, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
RoutineCVE-2026-33936tlsfuzzer · python-ecdsa +14 morepython-ecdsa: Denial of Service via improper DER length validation in crafted private keysThe `ecdsa` PyPI package is a pure Python implementation of ECC (Elliptic Curve Cryptography) with support for ECDSA (Elliptic Curve Digital Signature Algorithm), EdDSA (Edwards-curve Digital Signature Algorithm) and ECDH (Elliptic Curve Diffie-Hellman). Prior to version 0.19.2, an issue in the low-level DER parsing functions can cause unexpected exceptions to be raised from the public API functions. `ecdsa.der.remove_octet_string()` accepts truncated DER where the encoded length exceeds the available buffer. For example, an OCTET STRING that declares a length of 4096 bytes but provides only 3 bytes is parsed successfully instead of being rejected. Because of that, a crafted DER input can cause `SigningKey.from_der()` to raise an internal exception (`IndexError: index out of bounds on dimension 1`) rather than cleanly rejecting malformed DER (e.g., raising `UnexpectedDER` or `ValueError`). Applications that parse untrusted DER private keys may crash if they do not handle unexpected exceptions, resulting in a denial of service. Version 0.19.2 patches the issue.CVSS5.3MediumEPSS0.48%PrioritiseCVE-2024-23342tlsfuzzer · python-ecdsa +17 morepython-ecdsa vulnerable to Minerva attack on P-256The `ecdsa` PyPI package is a pure Python implementation of ECC (Elliptic Curve Cryptography) with support for ECDSA (Elliptic Curve Digital Signature Algorithm), EdDSA (Edwards-curve Digital Signature Algorithm) and ECDH (Elliptic Curve Diffie-Hellman). Versions 0.18.0 and prior are vulnerable to the Minerva attack. As of time of publication, no known patched version exists.CVSS7.4HighEPSS0.98%