Date: Wed, 16 Nov 2016 01:15:02 -0200 From: Dawid Golunski <dawid@...alhackers.com> To: oss-security@...ts.openwall.com Subject: Nginx (Debian-based distros) - Root Privilege Escalation Vulnerability (CVE-2016-1247) Vulnerability: Nginx (Debian-based distros) - Root Privilege Escalation Exploit (CVE-2016-1247) Discovered by: Dawid Golunski (@...id_golunski) https://legalhackers.com Nginx web server packaging on Debian-based distributions such as Debian or Ubuntu was found to create log directories with insecure permissions which can be exploited by malicious local attackers to escalate their privileges from nginx/web user (www-data) to root. The vulnerability could be easily exploited by attackers who have managed to compromise a web application hosted on Nginx server and gained access to www-data account to escalate their privileges to root without any admin interaction thanks to cron.daily. Vulnerability fixed in the following packages: Nginx 1.6.2-5+deb8u3 package on Debian Nginx 1.10.0-0ubuntu0.16.04.3 on Ubuntu (16.04 LTS) The up-to-date advisory can be found at: https://legalhackers.com/advisories/Nginx-Exploit-Deb-Root-PrivEsc-CVE-2016-1247.html For updates, follow: https://twitter.com/dawid_golunski Copy of the exploit is also attached to this message. Download attachment "nginxed-root.sh" of type "application/x-sh" (7235 bytes)
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