CVE-2020-7957

The 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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
mitreCNA
3.1 LOW
NETWORK
HIGH
NONE
CVSS:3.0/AC:H/AV:N/A:L/C:N/I:N/PR:N/S:U/UI:R
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 70%
VendorProductVersion
dovecotdovecot
2.3.9 ≤
𝑥
< 2.3.9.3
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
dovecot
bullseye
1:2.3.13+dfsg1-2+deb11u1
fixed
bullseye (security)
1:2.3.13+dfsg1-2+deb11u2
fixed
bookworm
1:2.3.19.1+dfsg1-2.1+deb12u1
fixed
bookworm (security)
1:2.3.19.1+dfsg1-2.1+deb12u1
fixed
sid
1:2.3.21.1+dfsg1-1
fixed
trixie
1:2.3.21.1+dfsg1-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
dovecot
eoan
not-affected
bionic
not-affected
xenial
not-affected
trusty
not-affected
Common Weakness Enumeration
References
http://www.openwall.com/lists/oss-security/2020/02/12/2
https://dovecot.org/pipermail/dovecot-news/2020-February/000430.html
https://dovecot.org/security
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XYT55WH372BJOXCJRKBDIFGBMPVOIDT/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NJXHOUT3FH2DJNMACSX4GHPP4MUV4UKA/
http://www.openwall.com/lists/oss-security/2020/02/12/2
https://dovecot.org/pipermail/dovecot-news/2020-February/000430.html
https://dovecot.org/security
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XYT55WH372BJOXCJRKBDIFGBMPVOIDT/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NJXHOUT3FH2DJNMACSX4GHPP4MUV4UKA/