CVE-2018-19131
Description
A Cross-Site Scripting vulnerability has been discovered in squid in the way X.509 certificates fields are displayed in some error pages. An attacker who can control the certificate of the origin content server may use this flaw to inject scripting code in the squid generated page, which is executed on the client's browser.
Mitigation
Remove %D error page macro from ERR_SECURE_CONNECT_FAIL pages found under /usr/share/squid/errors/ and any custom error pages.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.6 | 6.1 | N/A |
| Attack Vector | Adjacent Network | Network | N/A |
| Attack Complexity | High | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | Required | Required | N/A |
| Scope | Changed | Changed | N/A |
| Confidentiality | None | Low | N/A |
| Integrity Impact | High | Low | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N
NVD: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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