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CVE-2023-4527

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

Published: 9/18/2023 Last updated: 11/20/2025 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 (15)

Product Vendor Version
Red Hat Enterprise Linux 6 Red Hat < 10.0.17763.4010
Red Hat Enterprise Linux 7 Red Hat 3.1.0
Red Hat Enterprise Linux 7 Red Hat < 10.0.17763.4010
Red Hat Enterprise Linux 6 Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat < 6.0.6003.21915
Red Hat Enterprise Linux 8 Red Hat 3.0.0.4.386.51598
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 9 Red Hat <= None
Red Hat Enterprise Linux 9 Red Hat <= 7.0.14
Red Hat Enterprise Linux 6 Red Hat < 25.1.14445.5
Red Hat Enterprise Linux 8 Red Hat unspecified
Red Hat Enterprise Linux 7 Red Hat 7.2.0.2
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 9 Red Hat < 6.0.6003.21915
Red Hat Enterprise Linux 9 Red Hat <= 1.2.1.2

References (28)

Credits (2)