DescriptionThe JSON encoder in Dovecot before allows attackers to repeatedly crash the authentication service by attempting to authenticate with an invalid UTF-8 sequence as the username.
SourceCVE (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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
dovecot (PTS)buster1:
buster (security)1:
bookworm, sid1:

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
dovecotsourcejessie(not affected)
dovecotsourcestretch(not affected)


[stretch] - dovecot <not-affected> (Vulnerable code not present, introduced in 2.3)
[jessie] - dovecot <not-affected> (Vulnerable code not present, introduced in 2.3)

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