Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-40117 |
CWE-ID | CWE-119 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Cisco Adaptive Security Appliance (ASA) Hardware solutions / Security hardware applicances Cisco Firepower Threat Defense (FTD) Hardware solutions / Security hardware applicances ASA 5500-X Series Firewalls Other software / Other software solutions |
Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU57758
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-2021-40117
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error when processing SSL/TLS packets in SSL VPN interface. A remote attacker can send a specially crafted HTTPS request, trigger memory corruption and perform a denial of service (DoS) attack.
Install updates from vendor's website.
Vulnerable software versionsCisco Adaptive Security Appliance (ASA): 9.7 - 9.15.1.15
ASA 5500-X Series Firewalls: All versions
Cisco Firepower Threat Defense (FTD): 6.2.2 - 6.7.0.2
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dos-4ygzLKU9
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvy43187
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.