Vulnerability CVE-2015-7687
Published: 2017-10-16   Modified: 2017-10-17

Description:
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.

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Openbsd -> Opensmtpd 
Fedoraproject -> Fedora 

 References:
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170448.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169600.html
http://www.openwall.com/lists/oss-security/2015/10/03/1
http://www.securityfocus.com/bid/76975
https://bugzilla.redhat.com/show_bug.cgi?id=1268793
https://www.opensmtpd.org/announces/release-5.7.2.txt
https://www.qualys.com/2015/10/02/opensmtpd-audit-report.txt
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