What’s Vulnerable › Vulnerabilities
CVE-2021-33515
- Severity: medium (CVSS 4.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 2.9% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-06-28 · updated 2026-06-17
- Weakness: CWE-77
Description
The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address.
Affected products
- Debian Linux: 10.0
- dovecot: before 2.3.14.1 — fixed in 2.3.14.1
- Fedoraproject Fedora: 33, 34
How to fix
Upgrade to a fixed version: dovecot 2.3.14.1. Check the vendor advisory for mitigations.
References
- https://dovecot.org/security
- https://lists.debian.org/debian-lts-announce/2022/09/msg00032.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JB2VTJ3G2ILYWH5Y2FTY2PUHT2MD6VMI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TK424DWFO2TKJYXZ2H3XL633TYJL4GQN/
- https://security.gentoo.org/glsa/202107-41
- https://www.openwall.com/lists/oss-security/2021/06/28/2
- https://dovecot.org/security
- https://lists.debian.org/debian-lts-announce/2022/09/msg00032.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JB2VTJ3G2ILYWH5Y2FTY2PUHT2MD6VMI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TK424DWFO2TKJYXZ2H3XL633TYJL4GQN/
- https://security.gentoo.org/glsa/202107-41
- https://www.openwall.com/lists/oss-security/2021/06/28/2
Get alerted when CVE-2021-33515 or the next vulnerability affects your stack