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CVE-2020-14954

MEDIUMCVSS 5.9/10EPSS 2.29%

Last modified

CVE-2020-14954 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Mutt before 1.14.4 and NeoMutt before 2020-06-19 have a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a man-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection.". EPSS estimates a 2.29% chance of exploitation in the next 30 days.

Description

Mutt before 1.14.4 and NeoMutt before 2020-06-19 have a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a man-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection."

Metrics

CVSS 3.1
5.9/10

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

EPSS Probability
2.29%

81.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MuttMutt< 1.14.4
DebianDebian Linux9.0
DebianDebian Linux10.0
NeomuttNeomutt< 20200619
FedoraprojectFedora31
FedoraprojectFedora32
DebianDebian Linux8.0
CanonicalUbuntu Linux12.04
CanonicalUbuntu Linux16.04
CanonicalUbuntu Linux18.04
CanonicalUbuntu Linux19.10
CanonicalUbuntu Linux20.04
OpensuseLeap15.1
OpensuseLeap15.2

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-14954?
Mutt before 1.14.4 and NeoMutt before 2020-06-19 have a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a man-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection."
How severe is CVE-2020-14954?
CVE-2020-14954 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 2.29% probability of exploitation in the next 30 days.
How do I fix CVE-2020-14954?
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-2020-14954?

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

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Source: NVD / NIST