Multiple vulnerabilities in Zoom Client for Meetings
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-11876 CVE-2020-11877 |
| CWE-ID | CWE-254 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Zoom Client for Windows Client/Desktop applications / Office applications |
| Vendor | Zoom Video Communications, Inc. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Security Features
EUVDB-ID: #VU27053
Risk: High
CVSSv3.1: 7.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]
CVE-ID: CVE-2020-11876
CWE-ID:
CWE-254 - Security Features
Exploit availability: No
DescriptionThis vulnerability allows a remote attacker to bypass security rescritions feature.
The vulnerability exists due to the "airhost.exe" uses the SHA-256 hash of 0123425234234fsdfsdr3242 for initialization of an OpenSSL EVP AES-256 CBC context. A remote attacker can gain unauthorized access to the application.
Mitigation
Install update from vendor's website.
Vulnerable software versionsZoom Client for Windows: 4.6.11 20559.0413
External linksQ & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website or open a file.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Security Features
EUVDB-ID: #VU27054
Risk: High
CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]
CVE-ID: CVE-2020-11877
CWE-ID:
CWE-254 - Security Features
Exploit availability: No
DescriptionThis vulnerability allows a remote attacker to bypass security rescritions feature.
The vulnerability exists due to the "airhost.exe" uses 3423423432325249 as the Initialization Vector (IV) for AES-256 CBC encryption. A remote attacker can gain unauthorized access to the application.
MitigationInstall update from vendor's website.
Vulnerable software versionsZoom Client for Windows: 4.6.11 20559.0413
External linksQ & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website or open a file.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
