Vulnerability Name:

CVE-2020-3373 (CCN-190312)

Assigned:2019-12-12
Published:2020-10-21
Updated:2020-10-29
Summary:A vulnerability in the IP fragment-handling implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a memory leak on an affected device. This memory leak could prevent traffic from being processed through the device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper error handling when specific failures occur during IP fragment reassembly. An attacker could exploit this vulnerability by sending crafted, fragmented IP traffic to a targeted device. A successful exploit could allow the attacker to continuously consume memory on the affected device and eventually impact traffic, resulting in a DoS condition. The device could require a manual reboot to recover from the DoS condition.
Note: This vulnerability applies to both IP Version 4 (IPv4) and IP Version 6 (IPv6) traffic.
CVSS v3 Severity:8.6 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
7.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
8.6 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
7.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:7.8 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-401
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-3373

Source: XF
Type: UNKNOWN
cisco-cve20203373-dos(190312)

Source: CCN
Type: Cisco Security Advisory cisco-sa-asaftd-frag-memleak-mCtqdP9n
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IP Fragment Memory Leak Vulnerability

Source: CISCO
Type: Vendor Advisory
20201021 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IP Fragment Memory Leak Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/a:cisco:adaptive_security_appliance:9.8.4.22:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance:9.8.4.25:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance:9.12.4.2:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance:9.12.4.3:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance:9.13.1.12:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance:9.14.1.15:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:firepower_threat_defense:6.6.0.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco adaptive security appliance 9.8.4.22
    cisco adaptive security appliance 9.8.4.25
    cisco adaptive security appliance 9.12.4.2
    cisco adaptive security appliance 9.12.4.3
    cisco adaptive security appliance 9.13.1.12
    cisco adaptive security appliance 9.14.1.15
    cisco firepower threat defense 6.6.0.1