SB2013030201 - Amazon Linux AMI update for kernel
Published: March 2, 2013
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2012-4398)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The __request_module function in kernel/kmod.c in the Linux kernel before 3.4 does not set a certain killable attribute, which allows local users to cause a denial of service (memory consumption) via a crafted application.
2) Input validation error (CVE-ID: CVE-2012-4461)
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The KVM subsystem in the Linux kernel before 3.6.9, when running on hosts that use qemu userspace without XSAVE, allows local users to cause a denial of service (kernel OOPS) by using the KVM_SET_SREGS ioctl to set the X86_CR4_OSXSAVE bit in the guest cr4 register, then calling the KVM_RUN ioctl.
3) Information disclosure (CVE-ID: CVE-2012-4530)
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The load_script function in fs/binfmt_script.c in the Linux kernel before 3.7.2 does not properly handle recursion, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.
4) Race condition (CVE-ID: CVE-2013-0871)
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
Race condition in the ptrace functionality in the Linux kernel before 3.7.5 allows local users to gain privileges via a PTRACE_SETREGS ptrace system call in a crafted application, as demonstrated by ptrace_death.
Remediation
Install update from vendor's website.