CVE-2020-3452
Cisco — Cisco ASA and FTD Read-Only Path Traversal Vulnerability
Cisco · CWE-20 — Improper input validation | CWE-22 — Path traversal · in CISA KEV since 2021-11-03
EVRS 84 of 100 Urgent
Patch This Cycle
Rank 459 of 2,962 tracked
Why it scores 84
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.999.
- CISA KEVApplied
- RansomwareDid not apply
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
Fixed in
adaptive security appliance software: update to 9.6.4.42 or later | adaptive security appliance software: update to 9.8.4.20 or later | adaptive security appliance software: update to 9.9.2.74 or later | adaptive security appliance software: update to 9.10.1.42 or later | adaptive security appliance software: update to 9.12.3.12 or later | adaptive security appliance software: update to 9.13.1.10 or later
Affected versions
- secure firewall threat defense
>= 6.2.3 < 6.2.3.16>= 6.3.0 < 6.3.0.6>= 6.4.0 < 6.4.0.10>= 6.5.0 < 6.5.0.5>= 6.6.0 < 6.6.0.1 - adaptive security appliance software
>= 9.6 < 9.6.4.42>= 9.8 < 9.8.4.20>= 9.9 < 9.9.2.74>= 9.10 < 9.10.1.42>= 9.12 < 9.12.3.12>= 9.13 < 9.13.1.10>= 9.14 < 9.14.1.10 - asa 5505
- asa 5510
- asa 5512-x
- asa 5515-x
- asa 5520
- asa 5525-x
+6 more affected products; see the full list at NVD.
Remediation
Apply updates per vendor instructions.
Fixed versions from NVD.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 7.5 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.999 (99.99th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Unknown or none | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2022-05-03 · KEV since 2021 · listed over a year | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | None known | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 7.5 (v3.1), assigned by cisco. | Listed | ENISA EUVD |
Description
NVDA vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct directory traversal attacks and read sensitive files on a targeted system. The vulnerability is due to a lack of proper input validation of URLs in HTTP requests processed by an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request containing directory traversal character sequences to an affected device. A successful exploit could allow the attacker to view arbitrary files within the web services file system on the targeted device. The web services file system is enabled when the affected device is configured with either WebVPN or AnyConnect features. This vulnerability cannot be used to obtain access to ASA or FTD system files or underlying operating system (OS) files.
What CISA says to do