CVE-2021-34787CWE-183CWE-755

CVE-2021-34787

Medium · published October 27, 2021

CVSS v3.1
5.3
EPSS
1%
Percentile
63.8
In the wild
Unconfirmed
What it is

A vulnerability in the identity-based firewall (IDFW) rule processing feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass security protections. This vulnerability is due to improper handling of network requests by affected devices configured to use object group search. An attacker could exploit this vulnerability by sending a specially crafted network request to an affected device. A successful exploit could allow the attacker to bypass access control list (ACL) rules on the device, bypass security protections, and send network traffic to unauthorized hosts.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.01045 · 63.8th percentile
Weaknesses
CWE-183 · Permissive List of Allowed Inputs; CWE-755 · Improper Handling of Exceptional Conditions
Published
2021-10-27T23:15Z
Affected products (25)
ProductVersionsFixed in
cisco/adaptive_security_appliance< 9.8.4.409.8.4.40
cisco/secure_firewall_threat_defense< 6.4.0.136.4.0.13
cisco/secure_firewall_threat_defense≥ 6.5.0, < 6.6.56.6.5
cisco/secure_firewall_threat_defense≥ 6.7.0, < 6.7.0.36.7.0.3
cisco/secure_firewall_threat_defense≥ 7.0.0, < 7.0.17.0.1
cisco/adaptive_security_appliance_software≥ 9.9.0, < 9.12.4.259.12.4.25
cisco/adaptive_security_appliance_software≥ 9.13.0, < 9.14.3.19.14.3.1
cisco/adaptive_security_appliance_software≥ 9.15.0, < 9.15.1.179.15.1.17
cisco/adaptive_security_appliance_software≥ 9.16.0, < 9.16.1.289.16.1.28
cisco/asa_5512-x_firmwareall versions—
cisco/asa_5512-x_firmwareall versions—
cisco/asa_5505_firmwareall versions—
cisco/asa_5505_firmwareall versions—
cisco/asa_5515-x_firmwareall versions—
cisco/asa_5515-x_firmwareall versions—
cisco/asa_5525-x_firmwareall versions—
cisco/asa_5525-x_firmwareall versions—
cisco/asa_5545-x_firmwareall versions—
cisco/asa_5545-x_firmwareall versions—
cisco/asa_5555-x_firmwareall versions—
cisco/asa_5555-x_firmwareall versions—
cisco/asa_5580_firmwareall versions—
cisco/asa_5580_firmwareall versions—
cisco/asa_5585-x_firmwareall versions—
cisco/asa_5585-x_firmwareall versions—
References (2)
EPSS history
Timeline
  • 27 OCT 18:56Z
    Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Identity-Based Rule Bypass Vulnerability
    cvelistv5