CVE-2015-7687

CRITICAL

OpenSMTPD < 5.7.2 - Use-After-Free via req_ca_vrfy_smtp and req_ca_vrfy_mta

Title source: llm

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.

References (7)

Core 7

Core References

Third Party Advisory vendor-advisory x_refsource_fedora

http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170448.html

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/76975

Exploit, Technical Description, Third Party Advisory x_refsource_misc

https://www.qualys.com/2015/10/02/opensmtpd-audit-report.txt

Third Party Advisory vendor-advisory x_refsource_fedora

http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169600.html

Issue Tracking, Third Party Advisory, VDB Entry x_refsource_confirm

https://bugzilla.redhat.com/show_bug.cgi?id=1268793

Mailing List, Third Party Advisory, VDB Entry mailing-list x_refsource_mlist

http://www.openwall.com/lists/oss-security/2015/10/03/1

Release Notes, Vendor Advisory x_refsource_confirm

https://www.opensmtpd.org/announces/release-5.7.2.txt

Scores

CVSS v3 9.8

EPSS 0.1014

EPSS Percentile 93.2%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE

CWE-416

Status published

Products (3)

fedoraproject/fedora 22

fedoraproject/fedora 23

openbsd/opensmtpd < 5.7.1

Published Oct 16, 2017

Tracked Since Feb 18, 2026