#VU44819 Input validation error in libvirt - CVE-2011-2178

Vulnerability identifier: #VU44819

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-2178

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
libvirt
Universal components / Libraries / Libraries used by multiple products

Vendor: libvirt.org

Description

The vulnerability allows a local #AU# to gain access to sensitive information.

The virSecurityManagerGetPrivateData function in security/security_manager.c in libvirt 0.8.8 through 0.9.1 uses the wrong argument for a sizeof call, which causes incorrect processing of "security manager private data" that "reopens disk probing" and might allow guest OS users to read arbitrary files on the host OS. NOTE: this vulnerability exists because of a CVE-2010-2238 regression.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libvirt: 0.8.8 - 0.9.1

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External links
https://libvirt.org/news.html
https://lists.fedoraproject.org/pipermail/package-announce/2011-July/062515.html
https://lists.opensuse.org/opensuse-updates/2011-06/msg00030.html
https://people.canonical.com/~ubuntu-security/cve/2011/CVE-2011-2178.html
https://www.ubuntu.com/usn/USN-1152-1
https://bugzilla.redhat.com/show_bug.cgi?id=709769
https://bugzilla.redhat.com/show_bug.cgi?id=709775
https://www.redhat.com/archives/libvir-list/2011-May/msg01935.html

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.