cisco-sa-20190816-ftd-null
Vulnerability from csaf_cisco
Published
2019-08-16 16:00
Modified
2019-08-16 16:00
Summary
Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability
Notes
Summary
A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections.
The vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked.
There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null"]
Vulnerable Products
At the time of publication, this vulnerability affected all releases of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software.
See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products ["#vp"] section of this advisory are known to be affected by this vulnerability.
Workarounds
There are no workarounds that address this vulnerability.
Fixed Software
When considering software upgrades ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page ["https://www.cisco.com/go/psirt"], to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
Fixed Releases
For information about fixed software releases, see the Details section in the bug ID(s) at the top of this advisory.
Vulnerability Policy
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
Source
Cisco would like to thank NSS Labs, Inc. for reporting this vulnerability.
Legal Disclaimer
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.
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"text": "A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections.\r\n\r\nThe vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked.\r\n\r\nThere are no workarounds that address this vulnerability.\r\n\r\nThis advisory is available at the following link:\r\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null\"]",
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"text": "THIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.\r\n\r\nA standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.",
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"publisher": {
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"contact_details": "Emergency Support:\r\n+1 877 228 7302 (toll-free within North America)\r\n+1 408 525 6532 (International direct-dial)\r\nNon-emergency Support:\r\nEmail: psirt@cisco.com\r\nSupport requests that are received via e-mail are typically acknowledged within 48 hours.",
"issuing_authority": "Cisco product security incident response is the responsibility of the Cisco Product Security Incident Response Team (PSIRT). The Cisco PSIRT is a dedicated, global team that manages the receipt, investigation, and public reporting of security vulnerability information that is related to Cisco products and networks. The on-call Cisco PSIRT works 24x7 with Cisco customers, independent security researchers, consultants, industry organizations, and other vendors to identify possible security issues with Cisco products and networks.\r\nMore information can be found in Cisco Security Vulnerability Policy available at https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html",
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"title": "Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability",
"tracking": {
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"generator": {
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{
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{
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],
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},
{
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"product": {
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],
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},
"vulnerabilities": [
{
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"ids": [
{
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"text": "CSCvq39915"
}
],
"notes": [
{
"category": "other",
"text": "Complete.",
"title": "Affected Product Comprehensiveness"
}
],
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"CSAFPID-232928",
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"CSAFPID-232931",
"CSAFPID-232932",
"CSAFPID-232933",
"CSAFPID-233334",
"CSAFPID-245396",
"CSAFPID-245397",
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"CSAFPID-247893",
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"CSAFPID-247895",
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"CSAFPID-247898",
"CSAFPID-248816",
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"CSAFPID-251756",
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"CSAFPID-251759",
"CSAFPID-258063",
"CSAFPID-258064",
"CSAFPID-258065",
"CSAFPID-258066",
"CSAFPID-258915",
"CSAFPID-265011",
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"CSAFPID-265014",
"CSAFPID-265015",
"CSAFPID-265566",
"CSAFPID-265950"
]
},
"release_date": "2019-08-16T16:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"details": "Cisco has released software updates that address this vulnerability.",
"product_ids": [
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"CSAFPID-220206",
"CSAFPID-220207",
"CSAFPID-223029",
"CSAFPID-223031",
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"CSAFPID-232930",
"CSAFPID-232931",
"CSAFPID-232932",
"CSAFPID-232933",
"CSAFPID-233334",
"CSAFPID-245396",
"CSAFPID-245397",
"CSAFPID-245398",
"CSAFPID-247893",
"CSAFPID-247894",
"CSAFPID-247895",
"CSAFPID-247896",
"CSAFPID-247897",
"CSAFPID-247898",
"CSAFPID-248816",
"CSAFPID-251753",
"CSAFPID-251754",
"CSAFPID-251755",
"CSAFPID-251756",
"CSAFPID-251757",
"CSAFPID-251759",
"CSAFPID-258063",
"CSAFPID-258064",
"CSAFPID-258065",
"CSAFPID-258066",
"CSAFPID-258915",
"CSAFPID-265011",
"CSAFPID-265012",
"CSAFPID-265014",
"CSAFPID-265015",
"CSAFPID-265566",
"CSAFPID-265950"
],
"url": "https://software.cisco.com"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
"version": "3.0"
},
"products": [
"CSAFPID-220205",
"CSAFPID-220206",
"CSAFPID-220207",
"CSAFPID-223029",
"CSAFPID-223031",
"CSAFPID-223033",
"CSAFPID-225827",
"CSAFPID-226358",
"CSAFPID-226359",
"CSAFPID-226360",
"CSAFPID-227125",
"CSAFPID-232920",
"CSAFPID-232921",
"CSAFPID-232922",
"CSAFPID-232923",
"CSAFPID-232924",
"CSAFPID-232925",
"CSAFPID-232926",
"CSAFPID-232927",
"CSAFPID-232928",
"CSAFPID-232929",
"CSAFPID-232930",
"CSAFPID-232931",
"CSAFPID-232932",
"CSAFPID-232933",
"CSAFPID-233334",
"CSAFPID-245396",
"CSAFPID-245397",
"CSAFPID-245398",
"CSAFPID-247893",
"CSAFPID-247894",
"CSAFPID-247895",
"CSAFPID-247896",
"CSAFPID-247897",
"CSAFPID-247898",
"CSAFPID-248816",
"CSAFPID-251753",
"CSAFPID-251754",
"CSAFPID-251755",
"CSAFPID-251756",
"CSAFPID-251757",
"CSAFPID-251759",
"CSAFPID-258063",
"CSAFPID-258064",
"CSAFPID-258065",
"CSAFPID-258066",
"CSAFPID-258915",
"CSAFPID-265011",
"CSAFPID-265012",
"CSAFPID-265014",
"CSAFPID-265015",
"CSAFPID-265566",
"CSAFPID-265950"
]
}
],
"title": "Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.