CVE-2015-7687 Use after free in n/a

What is CVE-2015-7687?

CVE-2015-7687 is a critical use after free vulnerability in Fedoraproject Fedora, published on 16 Oct 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-416

Which versions are affected by CVE-2015-7687?

It affects 2 products.

Products include Fedoraproject Fedora, Openbsd Opensmtpd.

How do I fix CVE-2015-7687?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2015-7687 being exploited?

There is no known exploitation of CVE-2015-7687 in the wild and no public exploit code.

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• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2015-7687, GHSA-hmqq-mf9r-frq9, UBUNTU-CVE-2015-7687.