CVE-2021-31808

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to an input-validation bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy). A client sends an HTTP Range request to trigger this.

We have discovered 9,490 live websites that are affected by CVE-2021-31808.

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Affected Software

Product  squid
Category Cache Tools
Vulnerable Domains9,490 live websites (93.56% of squid install base)
Vulnerable Versions
  • from 0 before 5.0.6
Vulnerable Versions Count53 versions ( 77.94% of all versions)



Details

  • Published - May 27, 2021
  • Updated - Aug 3, 2024

CVE-2021-31808 usage by Country

United States874 websites


Germany4,323 websites
Japan1,027 websites
GB569 websites
China442 websites
Poland312 websites
France272 websites
Spain260 websites
Czech Republic148 websites
Italy145 websites

CVE-2021-31808 usage by TLD

.de2,733 websites
.com2,516 websites
.co.uk399 websites
.org378 websites
.net361 websites
.fr269 websites
.es216 websites
.pl202 websites
.at178 websites
.jp178 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2021-31808

Top websites that are affected by CVE-2021-31808. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
****.*********.net GB*,***
***.org United States*,***
*********.net GB*,***
*****.edu United States*,***
*********.**.uk GB**,***
*****.******.********.edu United States**,***
****.*********.net GB**,***
*******.**.jp United States**,***
************.de Germany**,***
*******.*************.eu Spain**,***
See full domain list

FAQ

A total of 9,490 websites have been identified as vulnerable to CVE-2021-31808, discovered through global website indexing conducted by WebTechSurvey.
squid is susceptible to CVE-2021-31808 vulnerability.
squid versions before 5.0.6 are vulnerable to CVE-2021-31808.
Version 5.0.6 of squid addresses the CVE-2021-31808 security vulnerability.