CVE-2015-7687

high-risk
Published 2017-10-16

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.

Do I need to act?

!
10.1% chance of exploitation in next 30 days
EPSS score — higher than 90% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (3)

Affected Vendors

Openbsd Fedoraproject

References (14)

Third Party Advisory http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170448.h...
Third Party Advisory http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169600.ht...
Mailing List http://www.openwall.com/lists/oss-security/2015/10/03/1
Third Party Advisory http://www.securityfocus.com/bid/76975
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1268793
Release Notes https://www.opensmtpd.org/announces/release-5.7.2.txt
Exploit https://www.qualys.com/2015/10/02/opensmtpd-audit-report.txt
Third Party Advisory http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170448.h...
Third Party Advisory http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169600.ht...
Mailing List http://www.openwall.com/lists/oss-security/2015/10/03/1
Third Party Advisory http://www.securityfocus.com/bid/76975
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1268793
Release Notes https://www.opensmtpd.org/announces/release-5.7.2.txt
Exploit https://www.qualys.com/2015/10/02/opensmtpd-audit-report.txt
52
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 11/34 · Low
Exposure 9/34 · Low