What’s Vulnerable › Vulnerabilities

CVE-2018-5157

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-06-11 · updated 2026-06-17
• Weakness: CWE-200

Description

Same-origin protections for the PDF viewer can be bypassed, allowing a malicious site to intercept messages meant for the viewer. This could allow the site to retrieve PDF files restricted to viewing by an authenticated user on a third-party website. This vulnerability affects Firefox ESR < 52.8 and Firefox < 60.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10, 18.04
• Debian Linux: 7.0, 8.0, 9.0
• Mozilla Firefox: before 52.8.0; before 60.0 — fixed in 52.8.0, 60.0
• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Server Aus: 7.6
• RedHat Enterprise Linux Server Eus: 7.5, 7.6
• RedHat Enterprise Linux Server Tus: 7.6
• RedHat Enterprise Linux Workstation: 6.0, 7.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 52.8.0, 60.0. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/104136
• http://www.securitytracker.com/id/1040896
• https://access.redhat.com/errata/RHSA-2018:1414
• https://access.redhat.com/errata/RHSA-2018:1415
• https://bugzilla.mozilla.org/show_bug.cgi?id=1449898
• https://lists.debian.org/debian-lts-announce/2018/05/msg00007.html
• https://security.gentoo.org/glsa/201810-01
• https://usn.ubuntu.com/3645-1/
• https://www.debian.org/security/2018/dsa-4199
• https://www.mozilla.org/security/advisories/mfsa2018-11/
• https://www.mozilla.org/security/advisories/mfsa2018-12/
• http://www.securityfocus.com/bid/104136

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