Improper access control in Cisco Expressway Software
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-3482 |
| CWE-ID | CWE-284 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Cisco Expressway Server applications / Conferencing, Collaboration and VoIP solutions Cisco TelePresence Video Communication Server Server applications / Other server solutions |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Improper access control
EUVDB-ID: #VU48563
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-3482
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper validation of specific connection information by the Traversal Using Relays around NAT (TURN) server. A remote attacker can send traffic through the affected software to destinations beyond the application and gain unauthorized network access.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco Expressway: before X12.6.3
Cisco TelePresence Video Communication Server: before X12.6.3
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-Expressway-8J3yZ7hV
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
