Advisory Details

November 10th, 2020

Cisco WebEx Network Recording Player ARF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-20-1361
ZDI-CAN-11133

CVE ID CVE-2020-3603
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Cisco
AFFECTED PRODUCTS WebEx
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Cisco WebEx Network Recording Player. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of ARF files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Cisco has issued an update to correct this vulnerability. More details can be found at:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-nbr-NOS6FQ24
DISCLOSURE TIMELINE
  • 2020-06-05 - Vulnerability reported to vendor
  • 2020-11-10 - Coordinated public release of advisory
CREDIT Francis Provencher {PRL}
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