Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-34787 |
CWE-ID | CWE-264 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
ASA 5500-X Series Firewalls Other software / Other software solutions Cisco Adaptive Security Appliance (ASA) Hardware solutions / Security hardware applicances Cisco Firepower Threat Defense (FTD) Hardware solutions / Security hardware applicances |
Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU57767
Risk: Medium
CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-34787
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists in the identity-based firewall (IDFW) rule processing feature. A remote attacker can send a specially crafted network request to bypass access control list (ACL) rules on the device, bypass security protections, and send network traffic to unauthorized hosts.
MitigationInstall updates from vendor's website.
Vulnerable software versionsASA 5500-X Series Firewalls: All versions
Cisco Adaptive Security Appliance (ASA): before 9.16.1.28
Cisco Firepower Threat Defense (FTD): before 7.0.1
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-rule-bypass-ejjOgQEY
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx47895
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.