Vulnerability in Roundcube Webmail
CVE-2016-9920
steps/mail/sendmail.inc in Roundcube before 1.1.7 and 1.2.x before 1.2.3, when no SMTP server is configured and the sendmail program is enabled, does not properly restrict the use of custom envelope-from addresses on the sendmail command line, which allows remote authenticated users to execute arbitrary code via a modified HTTP request that sends a crafted e-mail message.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.056 (92.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.056 · newest: 0.056 · change: 0.000
Affected products
- Roundcube Webmail — versions 1.2.0, 1.2.1, 1.2.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blog.ripstech.com/2016/roundcube-command-execution-via-email/ (Exploit, Third Party Advisory)
- www.securityfocus.com/bid/94858 (vdb-entry)
- www.openwall.com/lists/oss-security/2016/12/08/10 (mailing-list, Mailing List, Third Party Advisory)
- roundcube.net/news/2016/11/28/updates-1.2.3-and-1.1.7-released (Release Notes, Vendor Advisory)
- security.gentoo.org/glsa/201612-44 (vendor-advisory)
Frequently asked questions
- What is CVE-2016-9920?
- CVE-2016-9920 is a high-severity vulnerability in Roundcube Webmail, classified under Improper Access Control. CVSS score: 7.5/10. Published 2016-12-08.
- How severe is CVE-2016-9920?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-9920 known to be exploited?
- 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.