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 execution.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.623 (99.2th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.626 · newest: 0.623 · change: -0.003
Affected products
- Dovecot
- Dovecot Pigeonhole
- Debian Linux — versions 8.0
- Fedoraproject Fedora — versions 30
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.dovecot.org/security.html (Vendor Advisory)
- www.openwall.com/lists/oss-security/2019/08/28/3 (Exploit, Mailing List, Third Party Advisory)
- dovecot.org/pipermail/dovecot-news/2019-August/000417.html (Patch, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2019/08/msg00035.html (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/201908-29 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- access.redhat.com/errata/RHSA-2019:2822 (vendor-advisory)
- access.redhat.com/errata/RHSA-2019:2836 (vendor-advisory)
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.