PT-2020-12417 · Veeam · Veeam One Agent

Edgar Boda-Majer + 1 · Published 2020-04-16 · Updated 2020-05-04 · CVE-2020-10915

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions VEEAM One Agent version 9.5.4.4587

Description This issue allows remote attackers to execute arbitrary code on affected installations. Authentication is not required to exploit this issue. The flaw exists within the HandshakeResult method and results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this issue to execute code in the context of the service account.

Recommendations For VEEAM One Agent version 9.5.4.4587, consider disabling the HandshakeResult method as a temporary workaround until a patch is available. Restrict access to the service account to minimize the risk of exploitation. Avoid using untrusted data in the deserialization process until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2020-10915

ZDI-20-546

Affected Products

Veeam One Agent

References · 6

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/misc/veeam_one_agent_deserialization.rb · Exploit
• https://osv.dev/vulnerability/CVE-2020-10915 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-10915 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-20-546 · Security Note
• https://veeam.com/kb3144 · Vendor Advisory
• http://packetstormsecurity.com/files/157529/Veeam-ONE-Agent-.NET-Deserialization.html · Note