Squid Web Proxy up to 4.13/5.0.4 Config Setting uri_whitespace request smuggling
|CVSS Meta Temp Score|
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|Current Exploit Price (≈)|
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|CTI Interest Score|
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A vulnerability classified as critical has been found in Squid Web Proxy up to 4.13/5.0.4 (Firewall Software). Affected is the function
uri_whitespace of the component Config Setting Handler. The manipulation with an unknown input leads to a privilege escalation vulnerability. CWE is classifying the issue as CWE-444. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:
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.
The weakness was presented 03/19/2021. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2020-25097 since 09/03/2020. The exploitability is told to be easy. The attack needs to be done within the local network. A authentication is necessary for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/03/2021).
Applying a patch is able to eliminate this problem. The bugfix is ready for download at squid-cache.org.
CVSSv3VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9
VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍
NVD Base Score: 8.6
NVD Vector: 🔒
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
NVD Base Score: 🔒
ExploitingClass: Privilege escalation
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒
Threat IntelligenceInterest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍
0-Day Time: 🔒
Timeline09/03/2020 CVE assigned
03/19/2021 +197 days Advisory disclosed
03/19/2021 +0 days VulDB entry created
04/03/2021 +14 days VulDB last update
CVE: CVE-2020-25097 (🔒)
EntryCreated: 03/19/2021 11:39 AM
Updated: 04/03/2021 01:07 AM
Changes: (18) vulnerability_cvss2_nvd_basescore vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai vulnerability_cvss3_meta_basescore vulnerability_cvss3_meta_tempscore vulnerability_cvss3_nvd_basescore vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a
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