glibc Gaih_inet UAF via getaddrinfo with SUCCESS=continue/merge
CVE-2023-4813 Published on September 12, 2023
A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.
Vulnerability Analysis
CVE-2023-4813 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 no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2023-4813 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2023-4813
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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 0:2.28-189.8.el8_6 and below * is unaffected.
- Version 0:2.34-100.el9 and below * is unaffected.
- Version 0:2.34-60.el9_2.7 and below * is unaffected.
- Version 0:2.34-100.el9 and below * is unaffected.
- Version 0:2.34-60.el9_2.7 and below * is unaffected.
- Version 0:2.28-189.8.el8_6 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.