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CVE-2020-25097

HIGH
8.6
CVSS Score
Published: March 19, 2021 at 04:08 AM UTC
Updated: June 17, 2026 at 03:06 AM UTC
4 products affected across 4 vendorsDebian LinuxFedoraCache Squid

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Severity
HIGH8.6
Exploit prediction
EPSS 7%

Description

An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the security controls. This occurs for certain uri_whitespace configuration settings.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.0
Fedora· Fedora Projectrpm
95%
323334
Cloud Manager· NetApp
95%
All versions
Cache Squid· Squid Cache
95%
2.0 ≤ v < 4.145.0.1 ≤ v < 5.0.5
Affected range stops below 4.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.0.5, so it looks safe — our inference, not a vendor statement

References (9)

x_refsource_MISCMailing ListPatchVendor Advisory
Source: [email protected]
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_11.patch
x_refsource_MISCMailing ListPatchVendor Advisory
Source: [email protected]
http://www.squid-cache.org/Versions/v5/changesets/SQUID-2020_11.patch
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/squid-cache/squid/security/advisories/GHSA-jvf6-h9gj-pmj6
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DJMDRVV677AJL4BZAOLCT5LMFCGBZTC2/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FBXFWKIGXPERDVQXG556LLPUOCMQGERC/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3RYBDMJCPYGOSURWDR3WJTE474UFT77/
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202105-14
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210727-0010/

CVSS

8.6HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20CWE-444

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