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CVE-2021-28651

Quick assessment

Affected
n/a n/a
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Squid是一套代理服务器和Web缓存服务器软件。该软件提供缓存万维网、过滤流量、代理上网等功能。 Squid 存在资源管理错误漏洞。远程攻击者可以欺骗用户，使代理服务器后面的用户单击特制的"urn:"链接，从而导致服务器在攻击者的控制下，迫使Squid任意消耗服务器上的大量内存。以下产品及版本存在该漏洞：Squid: 2.0, 2.0.patch1, 2.0.patch2, 2.0.pre1, 2.0.release, 2.0_patch2, 2.1, 2.1.patch1, 2.1.patch2, 2

AI Predicted 7.5 Difficulty: Easy EPSS 7.45% · P94

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-28651

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Squid 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Squid是一套代理服务器和Web缓存服务器软件。该软件提供缓存万维网、过滤流量、代理上网等功能。 Squid 存在资源管理错误漏洞。远程攻击者可以欺骗用户，使代理服务器后面的用户单击特制的"urn:"链接，从而导致服务器在攻击者的控制下，迫使Squid任意消耗服务器上的大量内存。以下产品及版本存在该漏洞：Squid: 2.0, 2.0.patch1, 2.0.patch2, 2.0.pre1, 2.0.release, 2.0_patch2, 2.1, 2.1.patch1, 2.1.patch2, 2
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- n/a n/a -

II. Public POCs for CVE-2021-28651

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III. Intelligence Information for CVE-2021-28651

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Vendor Advisories for CVE-2021-28651 (3)

Mailing List Discussions for CVE-2021-28651 (5)

Other References for CVE-2021-28651 (1)

Same Patch Batch · n/a · 2021-05-27 · 74 CVEs total

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CVE-2020-22031 FFmpeg 缓冲区错误漏洞
CVE-2021-27490 Siemens Solid Edge 缓冲区错误漏洞
CVE-2021-27492 Siemens Solid Edge 代码问题漏洞
CVE-2021-27488 Siemens Solid Edge 缓冲区错误漏洞
CVE-2021-27496 Siemens Solid Edge 安全漏洞
CVE-2021-27494 Siemens Solid Edge 安全漏洞

Showing top 20 of 74 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2021-28651

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