PT-2021-2790 · Cisco · Cisco Asa+1

Published 2021-04-28 · Updated 2023-08-16 · CVE-2021-1501

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 (ASA) Software (affected versions not specified) Cisco Firepower Threat Defense (FTD) Software (affected versions not specified)

Description A vulnerability in the SIP inspection engine could allow an unauthenticated, remote attacker to cause a crash and reload of an affected device, resulting in a denial of service (DoS) condition. The issue is due to a crash that occurs during a hash lookup for a SIP pinhole connection. An attacker could exploit this by sending crafted SIP traffic through an affected device. A successful exploit could allow the attacker to cause a crash and reload of the affected device.

Recommendations For Cisco Adaptive Security Appliance (ASA) Software, at the moment, there is no information about a newer version that contains a fix for this vulnerability. For Cisco Firepower Threat Defense (FTD) Software, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Insufficient Session Expiration

Weakness Enumeration

CWE-613

Related Identifiers

BDU:2021-02333

CVE-2021-1501

Affected Products

Cisco Asa

Cisco Ftd

References · 7

• https://bdu.fstec.ru/vul/2021-02333 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-sipdos-GGwmMerC · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-sipdos-GGwmMerC · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-1501 · Security Note
• https://osv.dev/vulnerability/CVE-2021-1501 · Vendor Advisory
• https://t.me/cvenotify/56633 · Telegram Post
• https://t.me/cvenotify/13945 · Telegram Post