CVE-2023-4527 MEDIUM

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

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-121
Published September 18, 2023
Last update May 12, 2026
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 18, 2023 CVE published
May 12, 2026 Record updated