glibc getaddrinfo AF_UNSPEC no-aaaa TCP >2048: stack disclosure
CVE-2023-4527 Published on September 18, 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.
Vulnerability Analysis
CVE-2023-4527 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity, and a high impact on availability.
Weakness Type
What is a Stack Overflow Vulnerability?
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CVE-2023-4527 has been classified to as a Stack Overflow vulnerability or weakness.
Products Associated with CVE-2023-4527
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Affected Versions
Red Hat Enterprise Linux 8:- Version 0:2.28-225.el8_8.6 and below * is unaffected.
- Version 0:2.28-225.el8_8.6 and below * is unaffected.
- Version 0:2.34-60.el9_2.7 and below * is unaffected.
- Version 0:2.34-60.el9_2.7 and below * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.