SUSE update for webkit2gtk3

1) Security restrictions bypass

EUVDB-ID: #VU57811

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-42762

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists in BubblewrapLauncher.cpp due to application allows a sandboxed process to trick host processes into thinking the sandboxed process is not confined by the sandbox. A local user can abuse the VFS syscalls that manipulate its filesystem namespace and bypass implemented security restrictions. The impact is limited to host services that create UNIX sockets that WebKit mounts inside its sandbox, and the sandboxed process remains otherwise confined.

Mitigation

Update the affected package webkit2gtk3 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Desktop Applications: 15-SP2 - 15-SP3

SUSE Linux Enterprise Module for Basesystem: 15-SP2 - 15-SP3

libwebkit2gtk3-lang: before 2.32.4-15.1

webkit2gtk-4_0-injected-bundles-debuginfo: before 2.32.4-15.1

webkit2gtk-4_0-injected-bundles: before 2.32.4-15.1

libwebkit2gtk-4_0-37-debuginfo: before 2.32.4-15.1

libwebkit2gtk-4_0-37: before 2.32.4-15.1

libjavascriptcoregtk-4_0-18-debuginfo: before 2.32.4-15.1

libjavascriptcoregtk-4_0-18: before 2.32.4-15.1

webkit2gtk3-devel: before 2.32.4-15.1

webkit2gtk3-debugsource: before 2.32.4-15.1

typelib-1_0-WebKit2WebExtension-4_0: before 2.32.4-15.1

typelib-1_0-WebKit2-4_0: before 2.32.4-15.1

typelib-1_0-JavaScriptCore-4_0: before 2.32.4-15.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_module_for_desktop_applications:15-SP2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_desktop_applications:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_basesystem:15-SP2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_basesystem:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:a:suse:libwebkit2gtk3-lang:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:webkit2gtk-4_0-injected-bundles-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:webkit2gtk-4_0-injected-bundles:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libwebkit2gtk-4_0-37-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libwebkit2gtk-4_0-37:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libjavascriptcoregtk-4_0-18-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libjavascriptcoregtk-4_0-18:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:webkit2gtk3-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:webkit2gtk3-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:typelib-1_0-webkit2webextension-4_0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:typelib-1_0-webkit2-4_0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:typelib-1_0-javascriptcore-4_0:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213603-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.