Vulnerability Monitor

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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.

Published

2017-10-16T18:29:00.500

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-416

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	openbsd	opensmtpd	≤ 5.7.1	Yes
Operating System	fedoraproject	fedora	22	Yes
Operating System	fedoraproject	fedora	23	Yes

References

http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170448.html Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169600.html Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2015/10/03/1 Mailing List, Third Party Advisory, VDB Entry ([email protected])
http://www.securityfocus.com/bid/76975 Third Party Advisory, VDB Entry ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1268793 Issue Tracking, Third Party Advisory, VDB Entry ([email protected])
https://www.opensmtpd.org/announces/release-5.7.2.txt Release Notes, Vendor Advisory ([email protected])
https://www.qualys.com/2015/10/02/opensmtpd-audit-report.txt Exploit, Technical Description, Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170448.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169600.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2015/10/03/1 Mailing List, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/76975 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=1268793 Issue Tracking, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://www.opensmtpd.org/announces/release-5.7.2.txt Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.qualys.com/2015/10/02/opensmtpd-audit-report.txt Exploit, Technical Description, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)