CVE-2019-14859

Name	CVE-2019-14859
Description	A flaw was found in all python-ecdsa versions before 0.13.3, where it did not correctly verify whether signatures used DER encoding. Without this verification, a malformed signature could be accepted, making the signature malleable. Without proper verification, an attacker could use a malleable signature to create false transactions.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
References	DLA-1978-1, DSA-4588-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-ecdsa (PTS)	buster, buster (security)	0.13-3+deb10u1	fixed
	bullseye	0.16.1-1	fixed
	bookworm, sid	0.18.0-3	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
python-ecdsa	source	jessie	0.11-1+deb8u1	DLA-1978-1
python-ecdsa	source	stretch	0.13-2+deb9u1	DSA-4588-1
python-ecdsa	source	buster	0.13-3+deb10u1	DSA-4588-1
python-ecdsa	source	(unstable)	0.13.3-1

Notes

https://github.com/warner/python-ecdsa/issues/114
Upstream patches:
https://github.com/warner/python-ecdsa/pull/115
https://github.com/warner/python-ecdsa/pull/124
Fix for CVE-2019-14853 fixes as well CVE-2019-14859.