CVE-2019-14853

An error-handling flaw was found in python-ecdsa before version 0.13.3. During signature decoding, malformed DER signatures could raise unexpected exceptions (or no exceptions at all), which could lead to a denial of service.

Weakness

[PLANNED FOR DEPRECATION. SEE MAINTENANCE NOTES AND CONSIDER CWE-252, CWE-248, OR CWE-1069.] Ignoring exceptions and other error conditions may allow an attacker to induce unexpected behavior unnoticed.

Affected Software

Potential Mitigations

References

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14853
• https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3
• https://seclists.org/bugtraq/2019/Dec/33
• https://www.debian.org/security/2019/dsa-4588
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14853
• https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3
• https://seclists.org/bugtraq/2019/Dec/33
• https://www.debian.org/security/2019/dsa-4588