Vulnerability Details : 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 category: Memory CorruptionExecute codeDenial of service
Products affected by CVE-2015-7687
- cpe:2.3:a:openbsd:opensmtpd:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2015-7687
0.62%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 80 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2015-7687
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2015-7687
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The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2015-7687
-
https://www.qualys.com/2015/10/02/opensmtpd-audit-report.txt
Exploit;Technical Description;Third Party Advisory
-
https://www.opensmtpd.org/announces/release-5.7.2.txt
Release Notes;Vendor Advisory
-
http://www.openwall.com/lists/oss-security/2015/10/03/1
oss-security - Re: Qualys Security Advisory - OpenSMTPD Audit ReportMailing List;Third Party Advisory;VDB Entry
-
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169600.html
[SECURITY] Fedora 22 Update: opensmtpd-5.7.3p1-1.fc22Third Party Advisory
-
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170448.html
[SECURITY] Fedora 23 Update: opensmtpd-5.7.3p1-1.fc23Third Party Advisory
-
http://www.securityfocus.com/bid/76975
OpenSMTPD CVE-2015-7687 Use After Free Remote Code Execution VulnerabilityThird Party Advisory;VDB Entry
-
https://bugzilla.redhat.com/show_bug.cgi?id=1268793
1268793 – (CVE-2015-7687) CVE-2015-7687 OpenSMTPD: multiple vulnerabilities fixed in 5.7.2Issue Tracking;Third Party Advisory;VDB Entry
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