low
2.7
CWE
119
Advisory Published
Updated

CVE-2014-4021: Buffer Overflow

First published: Wed Jun 18 2014(Updated: )

Xen 3.2.x through 4.4.x does not properly clean memory pages recovered from guests, which allows local guest OS users to obtain sensitive information via unspecified vectors.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Xen xen-unstable=3.2.0
Xen xen-unstable=3.2.1
Xen xen-unstable=3.2.2
Xen xen-unstable=3.2.3
Xen xen-unstable=4.0.0
Xen xen-unstable=4.0.1
Xen xen-unstable=4.0.2
Xen xen-unstable=4.0.3
Xen xen-unstable=4.0.4
Xen xen-unstable=4.1.0
Xen xen-unstable=4.1.1
Xen xen-unstable=4.1.2
Xen xen-unstable=4.1.3
Xen xen-unstable=4.1.4
Xen xen-unstable=4.1.5
Xen xen-unstable=4.1.6.1
Xen xen-unstable=4.2.0
Xen xen-unstable=4.2.1
Xen xen-unstable=4.2.2
Xen xen-unstable=4.2.3
Xen xen-unstable=4.3.0
Xen xen-unstable=4.3.1
Xen xen-unstable=4.4.0
Xen xen-unstable=4.4.0-rc1

Remedy

http://xenbits.xen.org/xsa/advisory-100.html

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Reference Links

Frequently Asked Questions

  • What are the potential impacts of CVE-2014-4021?

    CVE-2014-4021 allows local guest OS users to potentially access sensitive information from memory pages not properly cleaned.

  • What versions of Xen are affected by CVE-2014-4021?

    CVE-2014-4021 affects Xen versions 3.2.0 through 4.4.0, including various sub-versions.

  • How can CVE-2014-4021 be mitigated?

    Mitigation for CVE-2014-4021 involves updating to a patched version of Xen that addresses the memory page cleaning issue.

  • Is CVE-2014-4021 a remote or local vulnerability?

    CVE-2014-4021 is a local vulnerability, requiring access to the guest operating system.

  • What should I do if I am using a vulnerable version as identified in CVE-2014-4021?

    If using a vulnerable version, you should upgrade to a non-vulnerable version of Xen as soon as possible to secure your system.

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