Incorrect default permissions in kexec-tools - CVE-2021-20269

Vulnerability identifier: #VU77475

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-20269

CWE-ID: CWE-276

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to incorrect default permissions for files and folders that are set by the application. A local user can read arbitrary files and leak kernel internal information from a previous panic.

kexec-tools
SIMATIC S7-1500 TM MFP - BIOS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
openEuler
kexec-tools
kexec-tools-debuginfo
kexec-tools-debugsource
kexec-tools-help
kexec-tools (Red Hat package)
IBM Spectrum Protect Plus

Install updates from vendor's website.

kexec-tools - addressed in versions 2.0.20-47, 2.0.21-8
kexec-tools - update to 2.0.20-16
kexec-tools-debuginfo - update to 2.0.20-16
kexec-tools-debugsource - update to 2.0.20-16
kexec-tools-help - update to 2.0.20-16
kexec-tools (Red Hat package) - update to 2.0.20-57.el8
IBM Spectrum Protect Plus - update to 10.1.11

• https://bugzilla.redhat.com/show_bug.cgi?id=1934261

• Incorrect default permissions in kexec-tools
• Multiple vulnerabilities in Siemens SIMATIC S7-1500 TM MFP - BIOS
• openEuler update for kexec-tools
• Red Hat Enterprise Linux 8 update for kexec-tools
• Multiple vulnerabilities in IBM Spectrum Protect Plus