CVE-2020-7957

Public Exploit

Description

The IMAP and LMTP components in Dovecot 2.3.9 before 2.3.9.3 mishandle snippet generation when many characters must be read to compute the snippet and a trailing > character exists. This causes a denial of service in which the recipient cannot read all of their messages.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.66% Top 30%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory dovecot.org Vendor Advisory dovecot.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://dovecot.org/security vendor advisory
http://www.openwall.com/lists/oss-security/2020/02/12/2 mailing list third party advisory exploit
https://dovecot.org/pipermail/dovecot-news/2020-February/000430.html vendor advisory mailing list exploit
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XYT55WH372BJOXCJRKBDIFGBMPVOIDT/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NJXHOUT3FH2DJNMACSX4GHPP4MUV4UKA/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-7957?
CVE-2020-7957 has been scored as a medium severity vulnerability.
How to fix CVE-2020-7957?
To fix CVE-2020-7957, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-7957 being actively exploited in the wild?
It is possible that CVE-2020-7957 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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