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CVE-2020-7957

MEDIUMCVSS 5.3/10EPSS 1.83%

Last modified

CVE-2020-7957 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 1.83% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS Probability
1.83%

76.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
DovecotDovecot>= 2.3.9, < 2.3.9.3
FedoraprojectFedora30
FedoraprojectFedora31

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-7957?
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.
How severe is CVE-2020-7957?
CVE-2020-7957 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.83% probability of exploitation in the next 30 days.
How do I fix CVE-2020-7957?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-7957?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST