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.

• CWE-416

• 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/37Exploit, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2020/05/18/1Mailing List, Third Party Advisory
• https://dovecot.org/securityVendor Advisory
• 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/2020/05/18/1Mailing List, Third Party Advisory
• 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/37Exploit, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2020/05/18/1Mailing List, Third Party Advisory
• https://dovecot.org/securityVendor Advisory
• 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/2020/05/18/1Mailing List, Third Party Advisory

Published

May 18, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2020-10952GitLab EE/CE 8.11 through 12.9.1 allows blocked users to pul…6.5
• CVE-2020-10953In GitLab EE 11.7 through 12.9, the NPM feature is vulnerabl…7.5
• CVE-2020-10954GitLab through 12.9 is affected by a potential DoS in reposi…7.5
• CVE-2020-10955GitLab EE/CE 11.1 through 12.9 is vulnerable to parameter ta…6.5
• CVE-2020-10956GitLab 8.10 and later through 12.9 is vulnerable to an SSRF …9.8
• CVE-2020-10957In Dovecot before 2.3.10.1, unauthenticated sending of malfo…7.5
• CVE-2020-10959resources/src/mediawiki.page.ready/ready.js in MediaWiki bef…6.1
• CVE-2020-1096A remote code execution vulnerability exists when Microsoft …7.5
• CVE-2020-10960In MediaWiki before 1.34.1, users can add various Cascading …5.3
• CVE-2020-10962In PowerShell App Deployment Toolkit (aka PSAppDeployToolkit…7.8
• CVE-2020-10963FrozenNode Laravel-Administrator through 5.0.12 allows unres…7.2
• CVE-2020-10964Serendipity before 2.3.4 on Windows allows remote attackers …9.8