Buffer overflow in Dovecot

CVE-2019-11500

In Dovecot before 2.2.36.4 and 2.3.x before 2.3.7.2 (and Pigeonhole before 0.5.7.2), protocol processing can fail for quoted strings. This occurs because '\0' characters are mishandled, and can lead to out-of-bounds writes and remote code…

Vulnerability class: Buffer Overflow

EPSS: 0.626 (99.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-11500?
CVE-2019-11500 is a critical-severity vulnerability in Dovecot, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-08-29.
How severe is CVE-2019-11500?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-11500 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.