Date: Mon, 26 Dec 2016 20:32:57 -0500 From: Michael Hess <mlhess@...ch.edu> To: oss-security@...ts.openwall.com Subject: Re: PHPMailer < 5.2.18 Remote Code Execution [CVE-2016-10033] https://github.com/opsxcq/exploit-CVE-2016-10033 FYI, Michael On Mon, Dec 26, 2016 at 7:10 PM, Tracy Reed <treed@...raviolet.org> wrote: > Note that confining the http process using SELinux or similar MAC system > can go a long way to constraining and limiting the damage of inevitable > vulnerabilities such as this. Particularly since this is command > injection which is precisely what SELinux is good at limiting (as > opposed to SQL injection). > > My shop has a policy that SELinux will be enabled on all web > applications and it has already saved us a few times despite being very > good at getting things patched up promptly. > > On Sun, Dec 25, 2016 at 06:21:07PM PST, Dawid Golunski spake thusly: >> PHPMailer < 5.2.18 Remote Code Execution [CVE-2016-10033] >> >> Severity: CRITICAL >> >> Discovered by: >> Dawid Golunski (@dawid_golunski) >> https://legalhackers.com >> >> >> PHPMailer >> "Probably the world's most popular code for sending email from PHP! >> Used by many open-source projects: WordPress, Drupal, 1CRM, SugarCRM, Yii, >> Joomla! and many more" >> >> Desc: >> An independent research uncovered a critical vulnerability in PHPMailer that >> could potentially be used by (unauthenticated) remote attackers to achieve >> remote arbitrary code execution in the context of the web server user and >> remotely compromise the target web application. >> To exploit the vulnerability an attacker could target common website >> components such as contact/feedback forms, registration forms, password >> email resets and others that send out emails with the help of a vulnerable >> version of the PHPMailer class. >> >> >> Patching: >> Responsibly disclosed to PHPMailer team. >> They've released a critical security release. >> If you are using an affected release update to the 5.2.18 security >> release as advised at: >> https://github.com/PHPMailer/PHPMailer/blob/master/changelog.md >> >> Notes: >> I know this is a bad timing and a short notice (for everyone probably ;) >> I've spent most of my Christmas break working on this issue with >> affected vendors. >> This has been quite a rush as one of the vendors leaked excessive >> information on this vulnerability at one point which could aid >> potential attackers. >> >> I've released a limited advisory at the link below: >> >> https://legalhackers.com/advisories/PHPMailer-Exploit-Remote-Code-Exec-CVE-2016-10033-Vuln.html >> >> This is to give people a chance to immediately patch or at least be >> aware of the issue before we get closer to a working day/end of >> holiday for affected users to act on this issue. >> >> I'm planning to release the full advisory and a PoC exploit shortly so >> that everyone is on the same page. >> >> Upcoming video PoC: >> >> https://legalhackers.com/videos/PHPMailer-Exploit-Remote-Code-Exec-Vuln-CVE-2016-10033-PoC.html >> >> >> For updates follow: >> >> https://twitter.com/dawid_golunski >> >> I'll also send another email to the list once it is published. >> >> For now, >> Patch it now before someone else patches it for you (through a reverse shell ;) >> >> -- >> Regards, >> Dawid Golunski >> https://legalhackers.com >> t: @dawid_golunski > > -- > Tracy Reed
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