CVE-2019-11500 is a critical vulnerability affecting Dovecot versions prior to 2.2.36.4 and 2.3.7.2, and Pigeonhole before 0.5.7.2, as well as Debian and FedoraProject distributions. It stems from mishandling of null characters in quoted strings during protocol processing, leading to out-of-bounds writes. This flaw carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low attack complexity, and potential for remote code execution, compromising confidentiality, integrity, and availability. While there is no evidence of active exploitation (KEV) or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2.2.36.4CPE matchmatch criteria | cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:* | ||
>= 2.3.0, < 2.3.7.2CPE matchmatch criteria | cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:* | ||
< 0.5.7.2CPE matchmatch criteria | cpe:2.3:a:dovecot:pigeonhole:*:*:*:*:*:*:*:* | ||
8.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | ||
30CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
dovecot: improper NULL byte handling in IMAP and ManageSieve protocol parsers leads to out of bounds writes
Aug 28, 2019IMAP and ManageSieve protocol parsers do not properly handle NUL byte when scanning data in quoted strings
Aug 28, 2019IMAP and ManageSieve protocol parsers do not properly handle NUL byte when scanning data in quoted strings
Aug 28, 2019IMAP and ManageSieve protocol parsers do not properly handle NUL byte when scanning data in quoted strings
Aug 28, 2019IMAP and ManageSieve protocol parsers do not properly handle NUL byte when scanning data in quoted strings
Aug 28, 2019CVE-2019-11500: IMAP and ManageSieve protocol parsers do not properly handle NUL byte when scanning data in quoted strings
Aug 28, 2019IMAP and ManageSieve protocol parsers do not properly handle NUL byte when scanning data in quoted strings
Aug 28, 2019CVE-2019-11500: IMAP and ManageSieve protocol parsers do not properly handle NUL byte when scanning data in quoted strings
Aug 28, 2019