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Published: 24 May 2017

A programming error exists in a way Randombit Botan cryptographic library version 2.0.1 implements x500 string comparisons which could lead to certificate verification issues and abuse. A specially crafted X509 certificate would need to be delivered to the client or server application in order to trigger this vulnerability.

From the Ubuntu security team

It was discovered that Botan did not properly manage x509 DN strings comparisons when provided with a specially crafted X509 certificate. An attacker could possibly use this issue to cause out of bound reads, resulting in information leakage, denial of service, or potentially incorrect certificate validation results.



CVSS 3 base score: 9.8


Package Release Status
Launchpad, Ubuntu, Debian
artful Not vulnerable
bionic Not vulnerable
cosmic Not vulnerable
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

precise Does not exist
(precise was needed)
trusty Does not exist
(trusty was needed)
Released (1.10.16-1)
xenial Ignored
(end of standard support, was needed)
yakkety Ignored
(reached end-of-life)
zesty Ignored
(reached end-of-life)