rhsa-2011:1532
Vulnerability from csaf_redhat
Published
2011-12-05 19:54
Modified
2025-09-25 11:44
Summary
Red Hat Security Advisory: kexec-tools security, bug fix, and enhancement update

Notes

Topic
An updated kexec-tools package that fixes three security issues, various bugs, and adds enhancements is now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
Details
Kexec allows for booting a Linux kernel from the context of an already running kernel. Kdump used the SSH (Secure Shell) "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. (CVE-2011-3588) 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. (CVE-2011-3589) mkdumprd included unneeded sensitive files (such as all files from the "/root/.ssh/" directory and the host's private SSH keys) in the resulting initrd. This could lead to an information leak when initrd files were previously created with world-readable permissions. Note: With this update, only the SSH client configuration, known hosts files, and the SSH key configured via the newly introduced sshkey option in "/etc/kdump.conf" are included in the initrd. The default is the key generated when running the "service kdump propagate" command, "/root/.ssh/kdump_id_rsa". (CVE-2011-3590) Red Hat would like to thank Kevan Carstensen for reporting these issues. This update also fixes several bugs and adds various enhancements. Space precludes documenting all of these changes in this advisory. Documentation for these bug fixes and enhancements will be available shortly from the Technical Notes document, linked to in the References section. All kexec-tools users should upgrade to this updated package, which contains backported patches to resolve these issues and add these enhancements.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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          "title": "Vulnerability description"
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            "6ComputeNode:kexec-tools-0:2.0.0-209.el6.x86_64",
            "6ComputeNode:kexec-tools-debuginfo-0:2.0.0-209.el6.i686",
            "6ComputeNode:kexec-tools-debuginfo-0:2.0.0-209.el6.ppc64",
            "6ComputeNode:kexec-tools-debuginfo-0:2.0.0-209.el6.s390x",
            "6ComputeNode:kexec-tools-debuginfo-0:2.0.0-209.el6.x86_64",
            "6Server:kexec-tools-0:2.0.0-209.el6.i686",
            "6Server:kexec-tools-0:2.0.0-209.el6.ppc64",
            "6Server:kexec-tools-0:2.0.0-209.el6.s390x",
            "6Server:kexec-tools-0:2.0.0-209.el6.src",
            "6Server:kexec-tools-0:2.0.0-209.el6.x86_64",
            "6Server:kexec-tools-debuginfo-0:2.0.0-209.el6.i686",
            "6Server:kexec-tools-debuginfo-0:2.0.0-209.el6.ppc64",
            "6Server:kexec-tools-debuginfo-0:2.0.0-209.el6.s390x",
            "6Server:kexec-tools-debuginfo-0:2.0.0-209.el6.x86_64",
            "6Workstation:kexec-tools-0:2.0.0-209.el6.i686",
            "6Workstation:kexec-tools-0:2.0.0-209.el6.ppc64",
            "6Workstation:kexec-tools-0:2.0.0-209.el6.s390x",
            "6Workstation:kexec-tools-0:2.0.0-209.el6.src",
            "6Workstation:kexec-tools-0:2.0.0-209.el6.x86_64",
            "6Workstation:kexec-tools-debuginfo-0:2.0.0-209.el6.i686",
            "6Workstation:kexec-tools-debuginfo-0:2.0.0-209.el6.ppc64",
            "6Workstation:kexec-tools-debuginfo-0:2.0.0-209.el6.s390x",
            "6Workstation:kexec-tools-debuginfo-0:2.0.0-209.el6.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kexec-tools: Multiple security flaws by management of kdump core files and ramdisk images"
    }
  ]
}


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