Use After Free in OpenBSD Opensmtpd
CVE-2015-7687
Use-after-free vulnerability in OpenSMTPD before 5.7.2 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via vectors involving req_ca_vrfy_smtp and req_ca_vrfy_mta.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.040 (90.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.041 · newest: 0.040 · change: -0.001
Affected products
- OpenBSD Opensmtpd
- Fedoraproject Fedora — versions 22, 23
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2015/10/03/1 (mailing-list, Mailing List, VDB Entry, Third Party Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-November/170448.html (vendor-advisory, Third Party Advisory)
- www.opensmtpd.org/announces/release-5.7.2.txt (Release Notes, Vendor Advisory)
- www.securityfocus.com/bid/76975 (VDB Entry, Third Party Advisory, vdb-entry)
- www.qualys.com/2015/10/02/opensmtpd-audit-report.txt (Technical Description, Exploit, Third Party Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-October/169600.html (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (VDB Entry, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2015-7687?
- CVE-2015-7687 is a critical-severity vulnerability in OpenBSD Opensmtpd, classified under Use After Free. CVSS score: 9.8/10. Published 2017-10-16.
- How severe is CVE-2015-7687?
- Critical severity. CVSS v3 base score is 9.8 out of 10.