Arch Linux Security Advisory ASA-201908-19 ========================================== Severity: Critical Date : 2019-08-28 CVE-ID : CVE-2019-11500 Package : pigeonhole Type : arbitrary code execution Remote : Yes Link : https://security.archlinux.org/AVG-1027 Summary ======= The package pigeonhole before version 0.5.7.2-1 is vulnerable to arbitrary code execution. Resolution ========== Upgrade to 0.5.7.2-1. # pacman -Syu "pigeonhole>=0.5.7.2-1" The problem has been fixed upstream in version 0.5.7.2. Workaround ========== None. Description =========== IMAP and ManageSieve protocol parsers in Dovecot before 2.3.7.2 and Pigeonhole before 0.5.7.2 do not properly handle NUL byte when scanning data in quoted strings, leading to out of bounds heap memory writes. Impact ====== A remote, unauthenticated attacker can access sensitive information or execute arbitrary code on the affected host via a crafted ManageSieve command. References ========== https://dovecot.org/pipermail/dovecot-news/2019-August/000417.html https://dovecot.org/pipermail/dovecot-news/2019-August/000418.html https://github.com/dovecot/core/commit/85fcb895ca7f0bcb8ee72047fe0e1e78532ff... https://github.com/dovecot/core/commit/f904cbdfec25582bc5e2a7435bf82ff769f25... https://github.com/dovecot/pigeonhole/commit/7ce9990a5e6ba59e89b7fe1c07f5742... https://github.com/dovecot/pigeonhole/commit/4a299840cdb51f61f8d1ebc0210b19c... https://security.archlinux.org/CVE-2019-11500