CVE-2016-6515 Denial of service in n/a

What is CVE-2016-6515?

CVE-2016-6515 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 7 Aug 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.

Weakness: CWE-20

Which versions are affected by CVE-2016-6515?

It affects 2 products.

Products include Fedoraproject Fedora, OpenSSH.

How do I fix CVE-2016-6515?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2016-6515 being exploited?

There is no known exploitation of CVE-2016-6515 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry and 3 proofs of concept on GitHub.

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• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
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All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as ALPINE-CVE-2016-6515, DEBIAN-CVE-2016-6515, DLA-594-1, GHSA-vf2p-h3m7-ch75, UBUNTU-CVE-2016-6515.