Actively exploited · Published Apr 2, 2021 · Assigned by apple
CVE-2021-1871
Critical 9.8 Exploited
In plain English
A critical-severity security flaw in iOS and iPadOS from Apple. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 7.0% (higher than 94% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)7.0%top 5.8% of all CVEs
Exploited in the wildYesCISA KEV since Nov 3, 2021
Attack toolingNoneno public tooling known
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Nov 17, 2021.
Official description
A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | LibRaw | 0.19.5-3.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | LibRaw-devel | 0.19.5-3.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | accountsservice | 0.6.55-2.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | accountsservice-devel | 0.6.55-2.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | accountsservice-libs | 0.6.55-2.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gdm | 1:40.0-15.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-autoar | 0.2.3-2.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-calculator | 3.28.2-2.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-classic-session | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-control-center | 3.28.2-28.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-control-center-filesystem | 3.28.2-28.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-online-accounts | 3.28.2-3.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-online-accounts-devel | 3.28.2-3.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-session | 3.28.1-13.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-session-kiosk-session | 3.28.1-13.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-session-wayland-session | 3.28.1-13.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-session-xsession | 3.28.1-13.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-settings-daemon | 3.32.0-16.el8.alma | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell | 3.32.2-40.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-apps-menu | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-auto-move-windows | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-common | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-dash-to-dock | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-desktop-icons | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-disable-screenshield | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-drive-menu | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-gesture-inhibitor | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-horizontal-workspaces | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-launch-new-instance | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-native-window-placement | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-no-hot-corner | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-panel-favorites | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-places-menu | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-screenshot-window-sizer | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-systemMonitor | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-top-icons | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-updates-dialog | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-user-theme | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-window-grouper | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-window-list | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-windowsNavigator | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-shell-extension-workspace-indicator | 3.32.1-20.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-software | 3.36.1-10.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gnome-software-devel | 3.36.1-10.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gsettings-desktop-schemas | 3.32.0-6.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gsettings-desktop-schemas-devel | 3.32.0-6.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gtk-update-icon-cache | 3.22.30-8.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gtk3 | 3.22.30-8.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gtk3-devel | 3.22.30-8.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | gtk3-immodule-xim | 3.22.30-8.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | mutter | 3.32.2-60.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | mutter-devel | 3.32.2-60.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | vino | 3.22.0-11.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | webkit2gtk3 | 2.32.3-2.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | webkit2gtk3-devel | 2.32.3-2.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | webkit2gtk3-jsc | 2.32.3-2.el8 | ALSA-2021:4381 |
| AlmaLinux:8 | webkit2gtk3-jsc-devel | 2.32.3-2.el8 | ALSA-2021:4381 |
| Alpine:v3.20 | webkit2gtk | 2.32.0-r0 | ALPINE-CVE-2021-1871 |
| Debian:12 | webkit2gtk | 2.32.0-2 | DEBIAN-CVE-2021-1871 |
| Debian:13 | webkit2gtk | 2.32.0-2 | DEBIAN-CVE-2021-1871 |
| Debian:14 | webkit2gtk | 2.32.0-2 | DEBIAN-CVE-2021-1871 |
| Debian:12 | wpewebkit | 2.32.0-2 | DEBIAN-CVE-2021-1871 |
| Debian:13 | wpewebkit | 2.32.0-2 | DEBIAN-CVE-2021-1871 |
| Debian:14 | wpewebkit | 2.32.0-2 | DEBIAN-CVE-2021-1871 |
| Rocky Linux:8 | LibRaw | 0:0.19.5-3.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | accountsservice | 0:0.6.55-2.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gdm | 1:40.0-15.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gnome-autoar | 0:0.2.3-2.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gnome-calculator | 0:3.28.2-2.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gnome-control-center | 0:3.28.2-28.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gnome-online-accounts | 0:3.28.2-3.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gnome-session | 0:3.28.1-13.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gnome-settings-daemon | 0:3.32.0-16.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gnome-settings-daemon | 0:3.32.0-16.el8_6.1 | RLSA-2021:4381 |
| Rocky Linux:8 | gnome-shell | 0:3.32.2-40.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gnome-shell-extensions | 0:3.32.1-20.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gnome-software | 0:3.36.1-10.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gsettings-desktop-schemas | 0:3.32.0-6.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | gtk3 | 0:3.22.30-8.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | mutter | 0:3.32.2-60.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | vino | 0:3.22.0-11.el8 | RLSA-2021:4381 |
| Rocky Linux:8 | webkit2gtk3 | 0:2.32.3-2.el8 | RLSA-2021:4381 |
| Ubuntu:22.04:LTS | qtwebkit-opensource-src | no fix listed | UBUNTU-CVE-2021-1871 |
| Ubuntu:24.04:LTS | qtwebkit-opensource-src | no fix listed | UBUNTU-CVE-2021-1871 |
| Ubuntu:22.04:LTS | wpewebkit | no fix listed | UBUNTU-CVE-2021-1871 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apple | iOS and iPadOS | unspecified – before 14.4 |
| Apple | macOS | unspecified – before 11.2 |
References
- https://support.apple.com/en-us/HT212147 x_refsource_MISC
- https://support.apple.com/en-us/HT212146 x_refsource_MISC
- FEDORA-2021-864dc37032 vendor-advisory, x_refsource_FEDORA
- DSA-4923 vendor-advisory, x_refsource_DEBIAN
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1871 government-resource