CVE-2020-3117 json
Cisco Web Security Appliance and Cisco Content Security Management Appliance HTTP Header Injection Vulnerability
published 6y ago modified 4mo ago also EUVD-2020-24388
- cvss
- 4.7
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
A vulnerability in the API Framework of Cisco AsyncOS for Cisco Web Security Appliance (WSA) and Cisco Content Security Management Appliance (SMA) could allow an unauthenticated, remote attacker to inject crafted HTTP headers in the web server's response. The vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user to access a crafted URL and receive a malicious HTTP response. A successful exploit could allow the attacker to inject arbitrary HTTP headers into valid HTTP responses sent to a user's browser.
Patch / fix
- cisco content_security_management_appliance 13.0.0-187
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.93% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 4.7 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N |
| NVD | 3.1 | 4.7 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Affected products
- Cisco Cisco Web Security Appliance (WSA)
Classification
- Weakness
-
- CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers
References
Sources
- CVE List CVE-2020-3117
- NVD CVE-2020-3117
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