CVE-2020-10957: dovecot NULL Pointer Dereference
CVSS: 7.5v3.0HighModified
AliasesALPINE-CVE-2020-10957RHSA-2020:2901UBUNTU-CVE-2020-10957DEBIAN-CVE-2020-10957
Published 18-05-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-10957 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in dovecot. EPSS estimates a 7.17% chance of exploitation in the next 30 days, higher than 94.2% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.0 (CVE.org)EPSS score
7.17%
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 8 · Related 6Timeline
- 18-05-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
In Dovecot before 2.3.10.1, unauthenticated sending of malformed parameters to a NOOP command causes a NULL Pointer Dereference and crash in submission-login, submission, or lmtp.
CVSS metrics
9 scores · 6 sources · 3 versionsHigh 7.5Preferred 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:HSourcesAll 5 agree
- OSV · Red hatEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
High 7.5Preferred score · CVE.org (CNA)
CVSS:3.0/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
7.17%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
0.00 pp
From 7.17% on 20-09-2026
20-09-202620-10-2026
EPSS score7.17%
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
Redhat10 products
- dovecot< 1:2.3.8-2.el8_2.1
- dovecot-debuginfo< 1:2.3.8-2.el8_2.1
- dovecot-debugsource< 1:2.3.8-2.el8_2.1
- dovecot-devel< 1:2.3.8-2.el8_2.1
- dovecot-mysql< 1:2.3.8-2.el8_2.1
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
5 vendors · 14 products
References
22 links- packetstormsecurity.com/files/…X Refsource MISC
