PT-2021-2789 · Cisco · Cisco Asa+1

Nikita Abramov · Published 2021-04-28 · Updated 2023-08-16 · CVE-2021-1504

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco Adaptive Security Appliance Software (ASA) and Cisco Firepower Threat Defense (FTD) Software (affected versions not specified)

Description The issue is related to a buffer overflow in the software of Cisco Adaptive Security Appliance (ASA) and Cisco Firepower Threat Defense (FTD). It could allow a remote attacker to cause a denial of service (DoS) condition on an affected device by sending a crafted HTTPS request. The vulnerabilities are due to a lack of proper input validation of the HTTPS request. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. This issue affects only specific AnyConnect and WebVPN configurations.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

BDU:2021-02332

CVE-2021-1504

Affected Products

Cisco Asa

Cisco Ftd

References · 8

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-vpn-dos-fpBcpEcD · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/664269 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-vpn-dos-fpBcpEcD · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-1504 · Security Note
• https://osv.dev/vulnerability/CVE-2021-1504 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-02332 · Security Note
• https://t.me/cvenotify/56630 · Telegram Post
• https://t.me/ptswarm/32 · Telegram Post