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CVE-2011-3589

Status Candidate

Overview

The Red Hat mkdumprd script for kexec-tools, as distributed in the kexec-tools 1.x before 1.102pre-154 and 2.x before 2.0.0-209 packages in Red Hat Enterprise Linux, uses world-readable permissions for vmcore files, which allows local users to obtain sensitive information by inspecting the file content, as demonstrated by a search for a root SSH key.

Related Files

Red Hat Security Advisory 2012-0152-03
Posted Feb 21, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0152-03 - The kexec-tools package contains the /sbin/kexec binary and utilities that together form the user-space component of the kernel's kexec feature. The /sbin/kexec binary facilitates a new kernel to boot using the kernel's kexec feature either on a normal or a panic reboot. The kexec fastboot mechanism allows booting a Linux kernel from the context of an already running kernel. Kdump used the SSH "StrictHostKeyChecking=no" option when dumping to SSH targets, causing the target kdump server's SSH host key not to be checked. This could make it easier for a man-in-the-middle attacker on the local network to impersonate the kdump SSH target server and possibly gain access to sensitive information in the vmcore dumps.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2011-3588, CVE-2011-3589, CVE-2011-3590
MD5 | eb49ee1b114201721ad0eac2826de7a6
Red Hat Security Advisory 2011-1532-03
Posted Dec 6, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-1532-03 - Kexec allows for booting a Linux kernel from the context of an already running kernel. Kdump used the SSH "StrictHostKeyChecking=no" option when dumping to SSH targets, causing the target kdump server's SSH host key not to be checked. This could make it easier for a man-in-the-middle attacker on the local network to impersonate the kdump SSH target server and possibly gain access to sensitive information in the vmcore dumps. mkdumprd created initrd files with world-readable permissions. A local user could possibly use this flaw to gain access to sensitive information, such as the private SSH key used to authenticate to a remote server when kdump was configured to dump to an SSH target.

tags | advisory, remote, kernel, local
systems | linux, redhat
advisories | CVE-2011-3588, CVE-2011-3589, CVE-2011-3590
MD5 | f991017ba1e5e5c40ceb8b09c657199f
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