CVE-2019-11500
dovecot: improper NULL byte handling in IMAP and ManageSieve protocol parsers leads to out of bounds writes
Severity
ImportantRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · August 28, 2019
Updated · November 22, 2025
Description
A flaw was found in dovecot. IMAP and ManageSieve protocol parsers do not properly handle the NULL byte when scanning data in quoted strings which leads to an out of bounds heap memory write. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 8.1CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-20 · Improper Input Validation