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CVE-2023-4527

Glibc: stack read overflow in getaddrinfo in no-aaaa mode

Published: 9/18/2023 Last updated: 5/12/2026 Reserved: 8/24/2023

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.

CNA assigner: redhat (53f830b8-0a3f-465b-8143-3b8a9948e749) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 6.5 Medium CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

Opam packages affected (1)

gettext-stub

Products affected (16)

Product Vendor Version
Red Hat Enterprise Linux 6 Red Hat Windows 10 Version 1703 for 32-bit Systems
Red Hat Enterprise Linux 7 Red Hat 8.0
Red Hat Enterprise Linux 7 Red Hat Windows 10 Version 1709 for 32-bit Systems
Red Hat Enterprise Linux 6 Red Hat n/a
Red Hat Enterprise Linux 6 Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 9 Red Hat Windows 10 for 32-bit Systems
Red Hat Enterprise Linux 9 Red Hat Windows 10 Version 1607 for x64-based Systems
Red Hat Enterprise Linux 6 Red Hat Windows 10 Version 1703 for x64-based Systems
Red Hat Enterprise Linux 8 Red Hat Android-7.1.1
Red Hat Enterprise Linux 7 Red Hat Windows 10 Version 1709 for ARM64-based Systems
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat Enterprise Linux 9 Red Hat n/a

References (32)

Credits (2)