CVE-2023-4527 Glibc: stack read overflow in getaddrinfo in no-aaaa mode

What is CVE-2023-4527?

CVE-2023-4527 is a medium-severity vulnerability in Fedoraproject Fedora, published on 18 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw was found in glibc. When the getaddrinfo function is called with the AF_UNSPEC address family and the system is configured with no-aaaa mode via /etc/resolv.conf, a DNS response via TCP larger than 2048 bytes can potentially disclose stack contents through the function returned address data, and may cause a crash.

Weakness: CWE-125, CWE-121

Which versions are affected by CVE-2023-4527?

It affects 27 products.

Products include Fedoraproject Fedora, Gnu Glibc, Netapp H300s Firmware, Netapp H410c Firmware, Netapp H410s Firmware, Netapp H500s Firmware and 21 more.

How do I fix CVE-2023-4527?

Apply the vendor's patch.

Is CVE-2023-4527 being exploited?

There is no known exploitation of CVE-2023-4527 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• 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 AZL-34732, BELL-CVE-2023-4527, DEBIAN-CVE-2023-4527, GHSA-hmf7-f8gf-8f4p.