PT-2023-20630 · Oracle · Jdk

Published 2023-08-02 · Updated 2024-01-12 · CVE-2023-26438

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions No specific software or versions are mentioned in the provided descriptions.

Description The issue involves a time-of-check/time-of-use (TOCTOU) weakness in external service lookups for several protocols, related to the JDK DNS cache. This weakness allows attackers to inject configuration that bypasses existing network deny-lists by timing DNS cache expiry correctly. As a result, attackers could exploit this to discover restricted network infrastructure and service availability. Improvements have been made to apply deny-lists during both the check and use of connection data.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Time Of Check To Time Of Use

SSRF

Weakness Enumeration

CWE-367

CWE-918

Related Identifiers

CVE-2023-26438

Affected Products

Jdk

References · 7

• https://osv.dev/vulnerability/CVE-2023-26438 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-26438 · Security Note
• https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0003.json · Vendor Advisory
• https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6230_7.10.6_2023-05-02.pdf · Note
• http://packetstormsecurity.com/files/173943/OX-App-Suite-SSRF-SQL-Injection-Cross-Site-Scripting.html · Note
• https://t.me/cibsecurity/67582 · Telegram Post
• http://seclists.org/fulldisclosure/2023/Aug/8 · Note