Squid Web Proxy up to 4.8 cachemgr.cgi Hostname injection

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Squid Web Proxy up to 4.8. Affected is an unknown function of the file cachemgr.cgi. Performing a manipulation of the argument Hostname as part of Parameter results in injection. This vulnerability was named CVE-2019-18860. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Squid Web Proxy up to 4.8 (Firewall Software). It has been classified as critical. This affects an unknown code of the file cachemgr.cgi. The manipulation of the argument hostname as part of a Parameter leads to a injection vulnerability. CWE is classifying the issue as CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. This is going to have an impact on confidentiality, and integrity. The summary by CVE is:

Squid before 4.9, when certain web browsers are used, mishandles HTML in the host (aka hostname) parameter to cachemgr.cgi.

The weakness was presented 03/20/2020 (GitHub Repository). The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2019-18860 since 11/11/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1055 for this issue.

Upgrading to version 4.9 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.1
VulDB Temp Score: 5.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Injection
CWE: CWE-74 / CWE-707 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Web Proxy 4.9
Patch: github.com

Timelineinfo

11/11/2019 🔍
03/20/2020 +130 days 🔍
03/21/2020 +1 days 🔍
11/05/2025 +2055 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: USN-4356-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-18860 (🔍)
GCVE (CVE): GCVE-0-2019-18860
GCVE (VulDB): GCVE-100-151953

Entryinfo

Created: 03/21/2020 08:53
Updated: 11/05/2025 04:15
Changes: 03/21/2020 08:53 (41), 03/21/2020 08:58 (18), 10/04/2020 05:56 (1), 04/18/2024 14:11 (19), 05/12/2025 13:45 (7), 11/05/2025 04:15 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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