CVE-2017-15420

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-08-28 · updated 2026-06-17
Weakness: CWE-20

Description

Incorrect handling of back navigations in error pages in Navigation in Google Chrome prior to 63.0.3239.84 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page.

Affected products

Debian Linux: 8.0, 9.0
Google Chrome: before 63.0.3239.84 — fixed in 63.0.3239.84
RedHat Enterprise Linux Desktop: 6.0
RedHat Enterprise Linux Server: 6.0
RedHat Enterprise Linux Workstation: 6.0

How to fix

Upgrade to a fixed version: Google Chrome 63.0.3239.84. Check the vendor advisory for mitigations.

References

http://www.securitytracker.com/id/1040282
https://access.redhat.com/errata/RHSA-2017:3401
https://chromereleases.googleblog.com/2017/12/stable-channel-update-for-desktop.html
https://crbug.com/777419
https://security.gentoo.org/glsa/201801-03
https://www.debian.org/security/2017/dsa-4064
https://www.debian.org/security/2018/dsa-4103
http://www.securitytracker.com/id/1040282
https://access.redhat.com/errata/RHSA-2017:3401
https://chromereleases.googleblog.com/2017/12/stable-channel-update-for-desktop.html
https://crbug.com/777419
https://security.gentoo.org/glsa/201801-03

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