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CVE-2021-30666

Published: 8 September 2021

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..

Notes

AuthorNote
jdstrand
webkit receives limited support. For details, see
https://wiki.ubuntu.com/SecurityTeam/FAQ#webkit
webkit in Ubuntu uses the JavaScriptCore (JSC) engine, not V8

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
qtwebkit-opensource-src
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

hirsute Ignored
(end of life)
jammy Needs triage

trusty Does not exist

upstream Needs triage

xenial Needs triage

kinetic Ignored
(end of life, was needs-triage)
impish Ignored
(end of life)
mantic Needs triage

lunar Ignored
(end of life, was needs-triage)
qtwebkit-source
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Does not exist

hirsute Does not exist

jammy Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

impish Does not exist

xenial Needs triage

kinetic Does not exist

mantic Does not exist

webkit2gtk
Launchpad, Ubuntu, Debian
bionic
Released (2.26.1-0ubuntu0.18.04.1)
focal Not vulnerable
(2.26.1-3)
hirsute Not vulnerable
(2.26.1-3)
jammy Not vulnerable
(2.26.1-3)
lunar Not vulnerable
(2.26.1-3)
trusty Does not exist

upstream
Released (2.26.0)
xenial Deferred

impish Not vulnerable
(2.26.1-3)
kinetic Not vulnerable
(2.26.1-3)
mantic Not vulnerable
(2.26.1-3)
webkitgtk
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Does not exist

hirsute Does not exist

jammy Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

impish Does not exist

xenial Needs triage

kinetic Does not exist

mantic Does not exist

wpewebkit
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Needs triage

hirsute Ignored
(end of life)
jammy Needs triage

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

impish Ignored
(end of life)
kinetic Does not exist

mantic Does not exist

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H