File-policy bypass via crafted HTTP responses
Published May 6, 2020 · Updated Nov 15, 2024
Improper HTTP response handling in Cisco Firepower Threat Defense before 6.6.0 allows remote attackers to bypass configured file policies. The Snort detection engine mishandles specific crafted HTTP responses traversing the device, so configured file policies fail to block the transferred content. No authentication is required; exploitation lets a malicious payload reach the protected network but does not itself execute that payload.
Summary
What happened
Improper HTTP response handling in Cisco Firepower Threat Defense before 6.6.0 allows remote attackers to bypass configured file policies. The Snort detection engine mishandles specific crafted HTTP responses traversing the device, so configured file policies fail to block the transferred content. No authentication is required; exploitation lets a malicious payload reach the protected network but does not itself execute that payload.
The record
- CVE
- CVE-2020-3315
- Published
- May 6, 2020
- Updated
- Nov 15, 2024
- Vendor
- ClamAV
- Product
- Cisco Firepower Threat Defense
- Classifications
- CWE-693, CWE-668, T1562.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 6, 2020CVE publishedPublication date reported by the CVE source.
- Nov 15, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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- Affected versionversion=n/a
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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