CVE-2019-14859 in Ubuntu

CVE-2019-14859

Priority

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.

References

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14859
https://en.bitcoinwiki.org/wiki/Transaction_Malleability
https://github.com/warner/python-ecdsa/pull/115
https://github.com/warner/python-ecdsa/pull/124
https://usn.ubuntu.com/usn/usn-4196-1

Bugs

https://github.com/warner/python-ecdsa/issues/114

Assigned-to

mdeslaur

Notes

mdeslaur

included in CVE-2019-14853 commits

Package

Source: python-ecdsa (LP Ubuntu Debian)

Upstream:	released (0.13.3-1)
Ubuntu 12.04 ESM (Precise Pangolin):	DNE
Ubuntu 14.04 ESM (Trusty Tahr):	DNE
Ubuntu 16.04 LTS (Xenial Xerus):	released (0.13-2ubuntu0.16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):	released (0.13-2ubuntu0.18.04.1)
Ubuntu 20.04 LTS (Focal Fossa):	not-affected (0.13.3-1)

More Information

Updated: 2020-07-28 20:06:44 UTC (commit d26b6ca9f5b3adb89bb036ce73ae7dab894935ec)