CVE-2020-10958: dovecot Use After Free
CVSS: 5.3v3.0MediumModified
AliasesALPINE-CVE-2020-10958UBUNTU-CVE-2020-10958DEBIAN-CVE-2020-10958
Published 18-05-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-10958 is a medium (CVSS 5.3) Use After Free vulnerability in dovecot. EPSS estimates a 6.12% chance of exploitation in the next 30 days, higher than 93.3% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
5.3/10
010
Medium · v3.0 (CVE.org)EPSS score
6.12%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 9 · Related 6Timeline
- 18-05-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
In Dovecot before 2.3.10.1, a crafted SMTP/LMTP message triggers an unauthenticated use-after-free bug in submission-login, submission, or lmtp, and can lead to a crash under circumstances involving many newlines after a command.
CVSS metrics
8 scores · 5 sources · 3 versionsMedium 5.3Preferred score · OSV · Alpine (Ecosystem advisory) · calculated from vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- NVDNIST5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Medium 5.3Preferred score · CVE.org (CNA)
CVSS:3.0/AC:L/AV:N/A:L/C:N/I:N/PR:N/S:U/UI:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- NVDNIST5.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
6.12%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
0.00 pp
From 6.12% on 20-09-2026
20-09-202620-10-2026
EPSS score6.12%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (seclists.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- dovecot< 2.3.10.1-r0
Debian1 product
- dovecot< 1:2.3.10.1+dfsg1-1
Dovecot1 product
- dovecot< 2.3.10.1
Ubuntu1 product
- dovecot< 1:2.3.7.2-1ubuntu3.1
4 vendors · 4 products
References
15 links- packetstormsecurity.com/files/…X Refsource MISC
