Multiple vulnerabilities in Cisco Jabber Desktop and Mobile Client Software



Risk High
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2020-26085
CVE-2020-27127
CVE-2020-27132
CVE-2020-27133
CVE-2020-27134
CWE-ID CWE-79
CWE-284
CWE-200
CWE-78
CWE-89
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Cisco Jabber for Windows
Client/Desktop applications / Messaging software

Cisco Jabber for MacOS
Client/Desktop applications / Messaging software

Cisco Jabber for Android and iOS
Client/Desktop applications / Messaging software

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Cross-site scripting

EUVDB-ID: #VU48947

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-26085

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within message contents. A remote authenticted attacker can trick the victim to open specially crafted XMPP messages and execute arbitrary HTML and script code in user's browser in context of vulnerable website, leading to arbitraty code execution with elevated privileges.

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Jabber for Windows: 12.1 - 12.9

Cisco Jabber for MacOS: 12.7 - 12.9

Cisco Jabber for Android and iOS: 12.8 - 12.9

CPE2.3 External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-jabber-ZktzjpgO


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) Improper access control

EUVDB-ID: #VU48948

Risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-27127

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper handling of input to the application protocol handlers. A remote attacker can trick a victim to click a link within a message sent by email or other messaging platform and modify the application configuration.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Jabber for Windows: 12.1 - 12.9

CPE2.3 External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-jabber-ZktzjpgO


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) Information disclosure

EUVDB-ID: #VU48949

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-27132

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to improper validation of message contents. A remote authenticated attacker can send specially crafted messages and gain unauthorized access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Jabber for Windows: 12.1 - 12.9

Cisco Jabber for MacOS: 12.7 - 12.9

CPE2.3 External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-jabber-ZktzjpgO


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.

4) OS Command Injection

EUVDB-ID: #VU48950

Risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-27133

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation within the application protocol handlers. A remote unauthenticated attacker can trick a victim to click a link within a message sent by email or other messaging platform and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Jabber for Windows: 12.1 - 12.9

CPE2.3 External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-jabber-ZktzjpgO


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.

5) SQL injection

EUVDB-ID: #VU48951

Risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-27134

CWE-ID: CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary SQL queries in database.

The vulnerability exists due to insufficient sanitization of user-supplied data within the message contents. A remote authenticated attacker can send a specially crafted XMPP messages, trick a victim to interact with a message and execute arbitrary SQL commands within the application database.

Successful exploitation of this vulnerability may allow a remote attacker to read, delete, modify data in database and gain complete control over the affected application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Jabber for Windows: 12.1 - 12.9

Cisco Jabber for MacOS: 12.7 - 12.9

Cisco Jabber for Android and iOS: 12.8 - 12.9

CPE2.3 External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-jabber-ZktzjpgO


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.



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