CVE-2018-18342

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-12-11 · updated 2026-06-17
Weakness: CWE-787

Description

Execution of user supplied Javascript during object deserialization can update object length leading to an out of bounds write in V8 in Google Chrome prior to 71.0.3578.80 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.

Affected products

Debian Linux: 9.0
Google Chrome: before 71.0.3578.80 — fixed in 71.0.3578.80
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 71.0.3578.80. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/106084
https://access.redhat.com/errata/RHSA-2018:3803
https://chromereleases.googleblog.com/2018/12/stable-channel-update-for-desktop.html
https://crbug.com/906313
https://security.gentoo.org/glsa/201908-18
https://www.debian.org/security/2018/dsa-4352
http://www.securityfocus.com/bid/106084
https://access.redhat.com/errata/RHSA-2018:3803
https://chromereleases.googleblog.com/2018/12/stable-channel-update-for-desktop.html
https://crbug.com/906313
https://security.gentoo.org/glsa/201908-18
https://www.debian.org/security/2018/dsa-4352

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