CVE-2020-10957: Null Pointer Dereference
First published: Mon May 18 2020(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/dovecot | <=1:2.3.2-1<=1:2.3.7.2-1<=1:2.3.4.1-5+deb10u1 | 1:2.3.4.1-5+deb10u2 1:2.3.10.1+dfsg1-1 |
| 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
- https://security-tracker.debian.org/tracker/CVE-2020-10957
- https://security-tracker.debian.org/tracker/CVE-2020-10958
- https://security-tracker.debian.org/tracker/CVE-2020-10967
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10957
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10958
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10967
- https://www.debian.org/security/2020/dsa-4690
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=960963
- 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.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-2020-10957
- https://nvd.nist.gov/vuln/detail/CVE-2020-10957
- https://ubuntu.com/security/CVE-2020-10957
Frequently Asked Questions
What is CVE-2020-10957?
CVE-2020-10957 is a vulnerability in Dovecot before 2.3.10.1 that allows unauthenticated sending of malformed parameters to a NOOP command, causing a NULL Pointer Dereference and crash.
How does CVE-2020-10957 impact Dovecot?
CVE-2020-10957 can be exploited by an attacker to cause a denial of service (crash) in the submission-login, submission, or lmtp components of Dovecot.
What is the severity of CVE-2020-10957?
CVE-2020-10957 has a severity rating of 7.5 (high).
How can I fix CVE-2020-10957?
To fix CVE-2020-10957, upgrade to Dovecot version 2.3.10.1 or later.
Where can I find more information about CVE-2020-10957?
You can find more information about CVE-2020-10957 at the following references: [Link 1](http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00059.html), [Link 2](http://packetstormsecurity.com/files/157771/Open-Xchange-Dovecot-2.3.10-Null-Pointer-Dereference-Denial-Of-Service.html), [Link 3](http://seclists.org/fulldisclosure/2020/May/37).
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