Multiple vulnerabilities in Zimbra Collaboration
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2022-0778 CVE-2021-28165 CVE-2019-0231 |
| CWE-ID | CWE-835 CWE-400 CWE-319 CWE-79 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
Zimbra Collaboration Web applications / Webmail solutions |
| Vendor | Synacor Inc. |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Infinite loop
EUVDB-ID: #VU61391
Risk: Medium
CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2022-0778
CWE-ID:
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop within the BN_mod_sqrt() function when processing an ASN.1 certificate that contains elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. A remote attacker can supply a specially crafted certificate to the TLS server or client, consume all available system resources and cause denial of service conditions.
MitigationInstall update from vendor's website.
Vulnerable software versionsZimbra Collaboration: 8.8.15 - 9.0.0 Patch 24.1
External linkshttp://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P25#Security_Fixes
http://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P32#Security_Fixes
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. However, proof of concept for this vulnerability is available.
2) Resource exhaustion
EUVDB-ID: #VU51876
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-28165
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources when processing large TLS frames. A remote attacker can send specially crafted data to the server, trigger CPU high load and perform a denial of service (DoS) attack.
MitigationInstall update from vendor's website.
Vulnerable software versionsZimbra Collaboration: 8.8.15 - 9.0.0 Patch 24.1
External linkshttp://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P25#Security_Fixes
http://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P32#Security_Fixes
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.
3) Cleartext transmission of sensitive information
EUVDB-ID: #VU26209
Risk: Low
CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-0231
CWE-ID:
CWE-319 - Cleartext Transmission of Sensitive Information
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to incorrect handling of close_notify SSL/TLS messages that results in software not closing the connection and retaining the socket opened, which allows a client to receive clear text messages afterward. A remote attacker can intercept traffic between client and server application and gain access to potentially sensitive information.
Install update from vendor's website.
Vulnerable software versionsZimbra Collaboration: 8.8.15 - 9.0.0 Patch 24.1
External linkshttp://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P25#Security_Fixes
http://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P32#Security_Fixes
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.
4) Cross-site scripting
EUVDB-ID: #VU66157
Risk: Medium
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Exploit availability: No
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data when displaying attachments data. A remote attacker can trick the victim to open a specially crafted attachment and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
MitigationInstall update from vendor's website.
Vulnerable software versionsZimbra Collaboration: 8.8.15 - 9.0.0 Patch 24.1
External linkshttp://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P25#Security_Fixes
http://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P32#Security_Fixes
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.
