CVE-2019-10691

NameCVE-2019-10691
DescriptionThe JSON encoder in Dovecot before 2.3.5.2 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 code/issues, web search, more)
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
dovecot (PTS)jessie1:2.2.13-12~deb8u4fixed
jessie (security)1:2.2.13-12~deb8u6fixed
stretch (security), stretch1:2.2.27-3+deb9u4fixed
buster, sid1:2.3.4.1-5fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
dovecotsource(unstable)1:2.3.4.1-4medium
dovecotsourcejessie(not affected)
dovecotsourcestretch(not affected)

Notes

[stretch] - dovecot <not-affected> (Vulnerable code not present, introduced in 2.3)
[jessie] - dovecot <not-affected> (Vulnerable code not present, introduced in 2.3)
https://www.openwall.com/lists/oss-security/2019/04/18/3

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