Advisory Details

April 22nd, 2021

Oracle OSS Support Tools Diagnostic Assistant XML External Entity Processing Information Disclosure Vulnerability

CVE ID	CVE-2021-2303
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	OSS Support Tools
VULNERABILITY DETAILS	This vulnerability allows remote attackers to disclose sensitive information on affected installations of Oracle OSS Support Tools. Authentication is required to exploit this vulnerability. The specific flaw exists within the Diagnostic Assistant component. Due to the improper restriction of XML External Entity (XXE) references, a crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. 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	2021-01-22 - Vulnerability reported to vendor 2021-04-22 - Coordinated public release of advisory
CREDIT	Quynh Le of VNPT ISC

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