Multiple vulnerabilities in Zimbra Collaboration

1) Improper Preservation of Permissions

EUVDB-ID: #VU105733

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-8633

CWE-ID: CWE-281 - Improper preservation of permissions

Exploit availability: No

Description

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to incorrect revocation of a shared calendar in Outlook. A remote user can access the calendar after it was revoked.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zimbra Collaboration: 8.8.15 Patch 1 - 8.8.15

CPE2.3

• cpe:2.3:a:synacor:zimbra_collaboration:8.8.15:Patch 1:*:*:*:*:*:*
• cpe:2.3:a:synacor:zimbra_collaboration:8.8.15:Patch 2:*:*:*:*:*:*
• cpe:2.3:a:synacor:zimbra_collaboration:8.8.15:Patch 3:*:*:*:*:*:*

External links

https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU105734

Risk: High

CVSSv4.0: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N/E:A/U:Amber]

CVE-ID: CVE-2020-7796

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input in WebEx zimlet. A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zimbra Collaboration: 8.8.15 Patch 1 - 8.8.15

CPE2.3

• cpe:2.3:a:synacor:zimbra_collaboration:8.8.15:Patch 1:*:*:*:*:*:*
• cpe:2.3:a:synacor:zimbra_collaboration:8.8.15:Patch 2:*:*:*:*:*:*
• cpe:2.3:a:synacor:zimbra_collaboration:8.8.15:Patch 3:*:*:*:*:*:*

External links

https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7

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?

Yes. This vulnerability is being exploited in the wild.