Vulnerability-Lookup

CNVD-2022-46476

Vulnerability from cnvd - Published: 2022-06-21

Title

Cisco Umbrella Secure Web Gateway文件解密绕过漏洞

Description

Cisco Umbrella是美国思科（Cisco）公司的一套云安全平台。该平台能够预防网络钓鱼、恶意软件和勒索软件等网络威胁。 Cisco Umbrella Secure Web Gateway存在文件解密绕过漏洞，经过身份验证攻击者可利用该漏洞绕过Cisco Umbrella SWG的解密过程并允许将恶意内容下载到受保护网络上的主机。

Severity

低

Patch Name

Cisco Umbrella Secure Web Gateway文件解密绕过漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uswg-fdbps-xtTRKpp6

Reference

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uswg-fdbps-xtTRKpp6

Impacted products

Name
Cisco Cisco Umbrella

Show details on source website

JSON

To clipboard

{
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    "cve": {
      "cveNumber": "CVE-2022-20805",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2022-20805"
    }
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  "serverity": "\u4f4e",
  "submitTime": "2022-04-22",
  "title": "Cisco Umbrella Secure Web Gateway\u6587\u4ef6\u89e3\u5bc6\u7ed5\u8fc7\u6f0f\u6d1e"
}

CVE-2022-20805 (GCVE-0-2022-20805)

Vulnerability from cvelistv5 – Published: 2022-04-21 18:51 – Updated: 2024-11-06 16:21

Title

Cisco Umbrella Secure Web Gateway File Decryption Bypass Vulnerability

Summary

A vulnerability in the automatic decryption process in Cisco Umbrella Secure Web Gateway (SWG) could allow an authenticated, adjacent attacker to bypass the SSL decryption and content filtering policies on an affected system. This vulnerability is due to how the decryption function uses the TLS Sever Name Indication (SNI) extension of an HTTP request to discover the destination domain and determine if the request needs to be decrypted. An attacker could exploit this vulnerability by sending a crafted request over TLS from a client to an unknown or controlled URL. A successful exploit could allow an attacker to bypass the decryption process of Cisco Umbrella SWG and allow malicious content to be downloaded to a host on a protected network. There are workarounds that address this vulnerability.

Severity

4.1 (Medium)


                        
                          CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-06 15:58 UTC

CWE

CWE-693

Assigner

cisco mitre root

References

1 reference

URL	Tags
https://tools.cisco.com/security/center/content/C…	vendor-advisoryx_refsource_CISCO

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco Umbrella Insights Virtual Appliance	Affected: n/a

Date Public

2022-04-20 00:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.