CVE-2021-1817 - webkitgtk: Memory corruption leading to arbitrary code execution

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HIGH

webkitgtk: Memory corruption leading to arbitrary code execution

Published Sep 8, 2021

8.8

HIGH

CVSS 3.1

EPSS 1.94%

Description

A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5. Processing maliciously crafted web content may lead to arbitrary code execution.

Affected products

Vendor Apple Product iOS and iPadOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <14.5
Vendor Apple Product macOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <11.3
Vendor Apple Product tvOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <14.5
Vendor Apple Product watchOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <7.4

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Apple

iOS and iPadOS

n/a

Version	Status	Constraints
unspecified	affected	<14.5

Apple

macOS

n/a

Version	Status	Constraints
unspecified	affected	<11.3

Apple

tvOS

n/a

Version	Status	Constraints
unspecified	affected	<14.5

Apple

watchOS

n/a

Version	Status	Constraints
unspecified	affected	<7.4

Red Hat Enterprise Linux 7 Extended Lifecycle Support

webkitgtk4-0:2.48.3-2.el7_9

Fixed · RHSA-2025:10364
Red Hat Enterprise Linux 8

webkit2gtk3-0:2.30.4-1.el8

Fixed · RHSA-2021:1586
Red Hat Enterprise Linux 6

webkitgtk

Out of support scope
Red Hat Enterprise Linux 7

webkitgtk3

Out of support scope
Red Hat Enterprise Linux 9

webkit2gtk3

Not affected

Product	Package	State	Advisory
Red Hat Enterprise Linux 7 Extended Lifecycle Support	webkitgtk4-0:2.48.3-2.el7_9	Fixed	RHSA-2025:10364
Red Hat Enterprise Linux 8	webkit2gtk3-0:2.30.4-1.el8	Fixed	RHSA-2021:1586
Red Hat Enterprise Linux 6	webkitgtk	Out of support scope	n/a
Red Hat Enterprise Linux 7	webkitgtk3	Out of support scope	n/a
Red Hat Enterprise Linux 9	webkit2gtk3	Not affected	n/a

Remediation

No remediation recorded yet.

Weaknesses (2)

CWE-20

Improper Input Validation

CWE-787

Out-of-bounds Write

References (9)

https://access.redhat.com/security/cve/CVE-2021-1817
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1986852
Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2021-1817
https://support.apple.com/en-us/HT212317
x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT212323
x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT212324
x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT212325
x_refsource_MISCVendor Advisory
https://webkitgtk.org/security/WSA-2021-0004.html
https://www.cve.org/CVERecord?id=CVE-2021-1817

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2021-1817		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1986852		Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2021-1817
https://support.apple.com/en-us/HT212317		x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT212323		x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT212324		x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT212325		x_refsource_MISCVendor Advisory
https://webkitgtk.org/security/WSA-2021-0004.html
https://www.cve.org/CVERecord?id=CVE-2021-1817