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osvGoogleOSV:USN-4993-1
HistoryJun 21, 2021 - 1:50 p.m.

dovecot vulnerabilities

2021-06-2113:50:48
Google
osv.dev
12
dovecot
vulnerabilities
jwt tokens
validation
starttls
ubuntu 20.10
ubuntu 21.04
cve-2021-29157
cve-2021-33515
smtp
plaintext commands

AI Score

7

Confidence

Low

EPSS

0.005

Percentile

77.0%

Kirin discovered that Dovecot incorrectly escaped kid and azp fields in JWT
tokens. A local attacker could possibly use this issue to validate tokens
using arbitrary keys. This issue only affected Ubuntu 20.10 and Ubuntu
21.04. (CVE-2021-29157)

Fabian Ising and Damian Poddebniak discovered that Dovecot incorrectly
handled STARTTLS when using the SMTP submission service. A remote attacker
could possibly use this issue to inject plaintext commands before
STARTTLS negotiation. (CVE-2021-33515)