Advisory Details

December 4th, 2020

Arcserve D2D getNews XML External Entity Processing Information Disclosure Vulnerability

ZDI-20-1397
ZDI-CAN-11103

CVE ID CVE-2020-27858
CVSS SCORE 7.5, (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
AFFECTED VENDORS Arcserve
AFFECTED PRODUCTS D2D
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of CA Arcserve D2D. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the getNews method. Due to the improper restriction of XML External Entity (XXE) references, a specially-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 SYSTEM.

ADDITIONAL DETAILS Arcserve has issued an update to correct this vulnerability. More details can be found at:
https://support.arcserve.com/s/article/P00002159?
DISCLOSURE TIMELINE
  • 2020-06-05 - Vulnerability reported to vendor
  • 2020-12-04 - Coordinated public release of advisory
CREDIT rgod
BACK TO ADVISORIES