CVE-2020-10958
CVE-2020-10958 is a medium-severity vulnerability in Dovecot with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 5.0
- EPSS exploit prediction: 6% (93rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-416
- Affected product: Dovecot
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2020-10958?
- 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.
- How severe is CVE-2020-10958?
- CVE-2020-10958 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
- Is CVE-2020-10958 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-10958?
- CVE-2020-10958 affects Dovecot. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-10958?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-10958 published?
- CVE-2020-10958 was published on 2020-05-18 and last updated on 2026-06-17.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00059.html
- http://packetstormsecurity.com/files/157771/Open-Xchange-Dovecot-2.3.10-Null-Pointer-Dereference-Denial-Of-Service.html
- http://seclists.org/fulldisclosure/2020/May/37
- http://www.openwall.com/lists/oss-security/2020/05/18/1
- https://dovecot.org/security
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TTZN2VW55ZC2AQBGBJMLRJSZIKSB2NS6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VVUWHUUAFPC6XGIXYFIPTNBXLHPNM4W6/
- https://usn.ubuntu.com/4361-1/
- https://www.debian.org/security/2020/dsa-4690
- https://www.openwall.com/lists/oss-security/2020/05/18/1
Affected products (1)
- cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*
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