Vulnerability · Published Jan 20, 2021 · Assigned by zdi

CVE-2020-27858

High 7.5

In plain English

A high-severity XML external entity in D2D from Arcserve. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 73.8% (higher than 99.5% of all known vulnerabilities).

Severity (CVSS 3.0)7.5High

Exploit odds (30 days)73.8%top 0.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

This vulnerability allows remote attackers to disclose sensitive information on affected installations of CA Arcserve D2D 16.5. 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. Was ZDI-CAN-11103.

Affected products (as reported)

Vendor	Product	Versions
Arcserve	D2D	16.5

Weakness: CWE-611 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://www.zerodayinitiative.com/advisories/ZDI-20-1397/ x_refsource_MISC