Advisory Details

April 22nd, 2021

Oracle WebLogic Server T3 Protocol Deserialization of Untrusted Data Information Disclosure Vulnerability

ZDI-21-454
ZDI-CAN-12492

CVE ID CVE-2021-2211
CVSS SCORE 4.9, AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
AFFECTED VENDORS Oracle
AFFECTED PRODUCTS WebLogic Server
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Oracle WebLogic Server. Authentication is required to exploit this vulnerability.

The specific flaw exists within the handling of the T3 protocol. Crafted data in a T3 protocol message can trigger the deserialization of untrusted data. An attacker can leverage this vulnerability to disclose information in the context of the service account.
ADDITIONAL DETAILS Oracle has issued an update to correct this vulnerability. More details can be found at:
https://www.oracle.com/security-alerts/cpuapr2021.html
DISCLOSURE TIMELINE
  • 2020-12-04 - Vulnerability reported to vendor
  • 2021-04-22 - Coordinated public release of advisory
CREDIT Quynh Le of VNPT ISC
BACK TO ADVISORIES