CVE-2020-10958: Use After Free
First published: Mon May 18 2020(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Dovecot Dovecot | <2.3.10.1 | |
| debian/dovecot | 1:2.3.13+dfsg1-2+deb11u1 1:2.3.13+dfsg1-2+deb11u2 1:2.3.19.1+dfsg1-2.1+deb12u1 1:2.3.21.1+dfsg1-1 |
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Reference Links
- 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@lists.fedoraproject.org/message/TTZN2VW55ZC2AQBGBJMLRJSZIKSB2NS6/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.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
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VVUWHUUAFPC6XGIXYFIPTNBXLHPNM4W6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TTZN2VW55ZC2AQBGBJMLRJSZIKSB2NS6/
- https://launchpad.net/bugs/cve/CVE-2020-10958
- https://security-tracker.debian.org/tracker/CVE-2020-10958
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10958
- https://nvd.nist.gov/vuln/detail/CVE-2020-10958
- https://ubuntu.com/security/CVE-2020-10958
Frequently Asked Questions
What is CVE-2020-10958?
CVE-2020-10958 is a vulnerability in Dovecot before version 2.3.10.1 that allows an unauthenticated attacker to trigger a use-after-free bug, leading to a crash.
What is the severity of CVE-2020-10958?
The severity of CVE-2020-10958 is medium, with a CVSS score of 5.3.
How can CVE-2020-10958 be exploited?
CVE-2020-10958 can be exploited by sending a crafted SMTP/LMTP message to the vulnerable Dovecot server.
How can I check if my version of Dovecot is affected?
You can check if your version of Dovecot is affected by CVE-2020-10958 by comparing the version number with the affected versions (before 2.3.10.1).
How do I fix CVE-2020-10958?
To fix CVE-2020-10958, you should update Dovecot to version 2.3.10.1 or later.
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