CVE-2023-26438
CVSS 3.1 Score 3.1 of 10 (low)
Details
Summary
CVE-2023-26438 is a vulnerability affecting the Java Development Kit (JDK) that allows external attackers to exploit a time-of-check/time-of-use (TOCTOU) weakness in DNS cache lookups. By timing DNS cache expiry correctly, attackers were able to inject configuration data that bypassed existing network deny-lists. This vulnerability could potentially enable attackers to discover the existence of restricted network infrastructure and service availability. The issue has been addressed by improvements that include deny-lists during both the check of connection data and during usage. No publicly available exploits have been reported as of now.
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