Vulnerability-Lookup

CNVD-2021-31661

Vulnerability from cnvd - Published: 2021-04-28

Title

Avast Premium Security后置链接漏洞

Description

Avast Premium Security是捷克Avast公司的一个应用软件。用于全面扫描网站漏洞。 Avast Premium Security 20.8.2429版本存在后置链接漏洞，攻击者可利用该漏洞可以滥用该服务来删除目录。

Severity

低

Patch Name

Avast Premium Security后置链接漏洞的补丁

Patch Description

Avast Premium Security是捷克Avast公司的一个应用软件。用于全面扫描网站漏洞。 Avast Premium Security 20.8.2429版本存在后置链接漏洞，攻击者可利用该漏洞可以滥用该服务来删除目录。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，详情请关注厂商主页： https://www.avast.com/zh-cn/premium-security#pc

Reference

https://www.zerodayinitiative.com/advisories/ZDI-21-208/

Impacted products

Name
Avast Avast Premium Security 20.8.2429

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-27241",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-27241"
    }
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-31661",
  "openTime": "2021-04-28",
  "patchDescription": "Avast Premium Security\u662f\u6377\u514bAvast\u516c\u53f8\u7684\u4e00\u4e2a\u5e94\u7528\u8f6f\u4ef6\u3002\u7528\u4e8e\u5168\u9762\u626b\u63cf\u7f51\u7ad9\u6f0f\u6d1e\u3002\r\n\r\nAvast Premium Security 20.8.2429\u7248\u672c\u5b58\u5728\u540e\u7f6e\u94fe\u63a5\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u53ef\u4ee5\u6ee5\u7528\u8be5\u670d\u52a1\u6765\u5220\u9664\u76ee\u5f55\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
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  "products": {
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  },
  "referenceLink": "https://www.zerodayinitiative.com/advisories/ZDI-21-208/",
  "serverity": "\u4f4e",
  "submitTime": "2021-04-23",
  "title": "Avast Premium Security\u540e\u7f6e\u94fe\u63a5\u6f0f\u6d1e"
}

CVE-2021-27241 (GCVE-0-2021-27241)

Vulnerability from cvelistv5 – Published: 2021-03-29 21:05 – Updated: 2024-08-03 20:48

Summary

This vulnerability allows local attackers to delete arbitrary directories on affected installations of Avast Premium Security 20.8.2429 (Build 20.8.5653.561). An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the AvastSvc.exe module. By creating a directory junction, an attacker can abuse the service to delete a directory. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-12082.

Severity

6.1 (Medium)


                        
                          CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

CWE

CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

zdi mitre root

References

1 reference

URL	Tags
https://www.zerodayinitiative.com/advisories/ZDI-…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Avast	Premium Security	Affected: 20.8.2429 (Build 20.8.5653.561)

Credits

Abdelhamid Naceri

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-03T20:48:15.888Z",
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            "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-208/"
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        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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                      "product_name": "Premium Security",
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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.