CVE-2020-7957

NameCVE-2020-7957
DescriptionThe IMAP and LMTP components in Dovecot 2.3.9 before 2.3.9.3 mishandle snippet generation when many characters must be read to compute the snippet and a trailing > character exists. This causes a denial of service in which the recipient cannot read all of their messages.
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

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~deb8u7fixed
stretch (security), stretch1:2.2.27-3+deb9u5fixed
buster, buster (security)1:2.3.4.1-5+deb10u1fixed
bullseye, sid1:2.3.7.2-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
dovecotsource(unstable)(not affected)

Notes

- dovecot <not-affected> (Only affects 2.3.9)
https://www.openwall.com/lists/oss-security/2020/02/12/2

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