CVE-2018-19591 Denial of service in n/a

What is CVE-2018-19591?

CVE-2018-19591 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 4 Dec 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

Weakness: CWE-20, CWE-404

Which versions are affected by CVE-2018-19591?

It affects 2 products.

Products include Fedoraproject Fedora, Gnu Glibc.

How do I fix CVE-2018-19591?

Apply the vendor's patch.

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-2018-19591 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-19591 exists.

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• 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-2018-19591, GHSA-x2fw-rj3g-6m95, UBUNTU-CVE-2018-19591.