Multiple vulnerabilities in Cisco Email Security Appliance, Content Security Management Appliance, and Web Security Appliance
| Risk | Medium |
| Patch available | NO |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2020-3546 CVE-2020-3547 CVE-2020-3548 |
| CWE-ID | CWE-200 CWE-407 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Cisco AsyncOS for Cisco Email Security Appliance Server applications / IDS/IPS systems, Firewalls and proxy servers Cisco Content Security Management Appliance Server applications / IDS/IPS systems, Firewalls and proxy servers Cisco Web Security Appliance Server applications / IDS/IPS systems, Firewalls and proxy servers |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Information disclosure
EUVDB-ID: #VU46247
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-3546
CWE-ID:
CWE-200 - Exposure of sensitive information to an unauthorized actor
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to insufficient validation of requests that are sent to the web-based management interface. A remote attacker can send a specially crafted request and obtain the IP addresses that are configured on the internal interfaces of the affected device.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsCisco AsyncOS for Cisco Email Security Appliance: 13.5.1
CPE2.3- cpe:2.3:a:cisco_systems:cisco_asyncos_for_cisco_email_security_appliance:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_asyncos_for_cisco_email_security_appliance:13.5.1:*:*:*:*:*:*:*
Q & 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 send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Information disclosure
EUVDB-ID: #VU46249
Risk: Medium
CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-3547
CWE-ID:
CWE-200 - Exposure of sensitive information to an unauthorized actor
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to an insecure method used to mask certain passwords on the web-based management interface. A remote authenticated attacker can look at the raw HTML code that is received from the interface and gain unauthorized access to sensitive information on the system.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsCisco AsyncOS for Cisco Email Security Appliance: 13.5.1 277
Cisco Content Security Management Appliance: 13.6.1 193
Cisco Web Security Appliance: 11.7.2 011
CPE2.3- cpe:2.3:a:cisco_systems:cisco_asyncos_for_cisco_email_security_appliance:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_asyncos_for_cisco_email_security_appliance:13.5.1 277:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_content_security_management_appliance:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_content_security_management_appliance:13.6.1 193:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_web_security_appliance:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_web_security_appliance:11.7.2 011:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Inefficient Algorithmic Complexity
EUVDB-ID: #VU46248
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-3548
CWE-ID:
CWE-407 - Inefficient Algorithmic Complexity
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to inefficient processing of incoming Transport Layer Security (TLS) traffic. A remote attacker can send specially crafted TLS packets, trigger a prolonged state of high CPU utilization and perform a denial of service (DoS) attack.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsCisco AsyncOS for Cisco Email Security Appliance: 13.5.1 277
CPE2.3- cpe:2.3:a:cisco_systems:cisco_asyncos_for_cisco_email_security_appliance:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_asyncos_for_cisco_email_security_appliance:13.5.1 277:*:*:*:*:*:*:*
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-tls-dos-xW53TBhb
Q & 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 send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
