Squid Web Proxy up to 4.3 X.509 Certificate cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Squid Web Proxy up to 4.3. The affected element is an unknown function of the component X.509 Certificate. Performing a manipulation results in cross site scripting. This vulnerability is reported as CVE-2018-19131. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Squid Web Proxy up to 4.3 (Firewall Software). It has been classified as problematic. This affects an unknown code of the component X.509 Certificate. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

Squid before 4.4 has XSS via a crafted X.509 certificate during HTTP(S) error page generation for certificate errors.

The bug was discovered 10/28/2018. The weakness was disclosed 11/09/2018 (Website). It is possible to read the advisory at squid-cache.org. This vulnerability is uniquely identified as CVE-2018-19131 since 11/09/2018. 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. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 12 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 119078 (openSUSE Security Update : squid (openSUSE-2018-1428)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171713 (SUSE Enterprise Linux Security Update for squid (SUSE-SU-2018:3771-1)).

Upgrading to version 4.4 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (119078). The entry VDB-126628 is pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
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: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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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Nessus ID: 119078
Nessus Name: openSUSE Security Update : squid (openSUSE-2018-1428)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Web Proxy 4.4
Patch: github.com

Timelineinfo

10/28/2018 🔍
11/09/2018 +12 days 🔍
11/09/2018 +0 days 🔍
11/09/2018 +0 days 🔍
11/10/2018 +1 days 🔍
11/20/2018 +10 days 🔍
11/21/2018 +1 days 🔍
06/05/2023 +1657 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: squid-cache.org
Status: Confirmed

CVE: CVE-2018-19131 (🔍)
GCVE (CVE): GCVE-0-2018-19131
GCVE (VulDB): GCVE-100-126627
See also: 🔍

Entryinfo

Created: 11/10/2018 08:11
Updated: 06/05/2023 14:06
Changes: 11/10/2018 08:11 (74), 04/11/2020 12:33 (2), 06/05/2023 14:06 (4)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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