Improper input validation in Dovecot
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.019 (78.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
- Dovecot
- Fedoraproject Fedora — versions 30, 31
Weakness classification (CWE)
References
- dovecot.org/security (Vendor Advisory)
- www.openwall.com/lists/oss-security/2020/02/12/2 (Exploit, Mailing List, Third Party Advisory)
- dovecot.org/pipermail/dovecot-news/2020-February/000430.html (Exploit, Mailing List, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2020-7957?
- CVE-2020-7957 is a medium-severity vulnerability in Dovecot, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2020-02-12.
- How severe is CVE-2020-7957?
- Medium severity. CVSS v3 base score is 5.3 out of 10.