External service lookups for a number of protocols were vulnerable to a time-of-check/time-of-use (TOCTOU) weakness, involving the JDK DNS cache. Attackers that were timing DNS cache expiry correctly were able to inject configuration that would bypass existing network deny-lists. Attackers could exploit this weakness to discover the existence of restricted network infrastructure and service availability. Improvements were made to include deny-lists not only during the check of the provided connection data, but also during use. No publicly available exploits are known.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Open-xchange |
|
Configuration 1 [-]
|
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Advisories
| Source | ID | Title |
|---|---|---|
 EUVD |
EUVD-2023-30258 | External service lookups for a number of protocols were vulnerable to a time-of-check/time-of-use (TOCTOU) weakness, involving the JDK DNS cache. Attackers that were timing DNS cache expiry correctly were able to inject configuration that would bypass existing network deny-lists. Attackers could exploit this weakness to discover the existence of restricted network infrastructure and service availability. Improvements were made to include deny-lists not only during the check of the provided connection data, but also during use. No publicly available exploits are known. |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: OX
Published:
Updated: 2024-08-02T11:46:24.656Z
Reserved: 2023-02-22T20:42:56.090Z
Link: CVE-2023-26438
Vulnrichment
No data.
NVD
Status : Modified
Published: 2023-08-02T13:15:10.323
Modified: 2024-11-21T07:51:27.023
Link: CVE-2023-26438
Redhat
No data.
OpenCVE Enrichment
No data.