Critical Security Advisory: kexec-tools Vulnerability in Red Hat Enterprise Linux 5
Summary
RHSA-2012:0152: Red Hat Security Advisory: kexec-tools security, bug fix, and enhancement update. Affects kexec-tools versions < 0:1.102pre-154.el5. Fixed in 0:1.102pre-154.el5. How to fix ↓
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Background
kexec-tools is a package in Red Hat Enterprise Linux that facilitates the loading of a new kernel without going through the bootloader. This functionality is crucial for system administrators who need to quickly reboot into a new kernel for updates or troubleshooting. The package is widely used in both client and server environments, making its security paramount. The vulnerability in question affects both the client and server versions of kexec-tools, potentially exposing systems to security risks.
Vulnerability Detail
The vulnerabilities identified as CVE-2011-3588, CVE-2011-3589, and CVE-2011-3590 stem from flaws in the kexec-tools package that could allow an attacker to exploit the system during the kernel loading process. These vulnerabilities could lead to unauthorized access or denial of service, compromising the integrity and availability of the system. The issues were introduced in earlier versions of the package and have been addressed in the latest updates.
How To Fix
Minimum fixed version
0:1.102pre-154.el5
This is the first release that contains the fix.
sudo dnf update kexec-toolsTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not possible, consider disabling the kexec functionality temporarily until the package can be updated. This can be done by modifying the system configuration to prevent kexec from being invoked during kernel updates.
Conclusion
The kexec-tools vulnerabilities pose significant risks to systems running Red Hat Enterprise Linux 5. It is crucial for users to update to the latest patched versions to mitigate these risks. Regular monitoring and prompt updates are essential for maintaining system security.
See every vulnerability recorded for kexec-tools →
FAQ
The vulnerabilities include potential unauthorized access and denial of service due to flaws in the kernel loading process.
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All versions prior to 0:1.102pre-154.el5 are affected by these vulnerabilities.
Yes, if exploited, these vulnerabilities could lead to unauthorized access, potentially resulting in data loss or corruption.
Consider disabling the kexec functionality temporarily until you can apply the necessary updates.
Related vulnerabilities
Recent vulnerabilities recorded for kexec-tools.
