CVE-2019-14853

NameCVE-2019-14853
DescriptionAn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1978-1, DSA-4588-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python-ecdsa (PTS)stretch (security), stretch0.13-2+deb9u1fixed
buster, buster (security)0.13-3+deb10u1fixed
bullseye, sid0.15-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python-ecdsasourcejessie0.11-1+deb8u1DLA-1978-1
python-ecdsasourcestretch0.13-2+deb9u1DSA-4588-1
python-ecdsasourcebuster0.13-3+deb10u1DSA-4588-1
python-ecdsasource(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.

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