Advisory Details

September 8th, 2023

Visualware MyConnection Server doIForward XML External Entity Processing Information Disclosure Vulnerability

ZDI-23-1397
ZDI-CAN-21774

CVE ID CVE-2023-42035
CVSS SCORE 6.5, AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
AFFECTED VENDORS Visualware
AFFECTED PRODUCTS MyConnection Server
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Visualware MyConnection Server. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the doIForward method. 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 root.

ADDITIONAL DETAILS Visualware has issued an update to correct this vulnerability. More details can be found at:
https://myconnectionserver.visualware.com/support/security-advisories
DISCLOSURE TIMELINE
  • 2023-07-31 - Vulnerability reported to vendor
  • 2023-09-08 - Coordinated public release of advisory
CREDIT 06fe5fd2bc53027c4a3b7e395af0b850e7b8a044
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