Arch Linux Security Advisory ASA-201903-16 ========================================== Severity: High Date : 2019-03-28 CVE-ID : CVE-2019-7524 Package : dovecot Type : privilege escalation Remote : No Link : https://security.archlinux.org/AVG-944 Summary ======= The package dovecot before version 2.3.5.1-1 is vulnerable to privilege escalation. Resolution ========== Upgrade to 2.3.5.1-1. # pacman -Syu "dovecot>=2.3.5.1-1" The problem has been fixed upstream in version 2.3.5.1. Workaround ========== None. Description =========== A stack-based buffer overflow has been found in Dovecot versions prior to 2.3.5.1. When reading FTS or POP3-UIDL header from dovecot index, the input buffer size is not bound, and data is copied to target structure causing stack overflow. This can be used for local root privilege escalation or executing arbitrary code in dovecot process context. This requires ability to directly modify dovecot indexes. Impact ====== A local attacker with the ability to alter FTS or POP3-UIDL files can escalate privileges to root. References ========== https://seclists.org/oss-sec/2019/q1/197 https://dovecot.org/pipermail/dovecot/2019-March/115296.html https://github.com/dovecot/core/commit/79679674eb6d2c7d38f2537e613efc103058d... https://github.com/dovecot/core/commit/d79845350e0754f5e25c41bd56591ddd5b0a3... https://security.archlinux.org/CVE-2019-7524