Multiple vulnerabilities in libvirt

1) Input validation error

EUVDB-ID: #VU44819

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 - Improper input validation

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:libvirt_org:libvirt:0.8.8:*:*:*:*:*:*:*
• cpe:2.3:a:libvirt_org:libvirt:0.9.0:*:*:*:*:*:*:*
• cpe:2.3:a:libvirt_org:libvirt:0.9.1:*:*:*:*:*:*:*

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

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.

2) Input validation error

EUVDB-ID: #VU44820

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-2511

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote #AU# to perform service disruption.

Integer overflow in libvirt before 0.9.3 allows remote authenticated users to cause a denial of service (libvirtd crash) and possibly execute arbitrary code via a crafted VirDomainGetVcpus RPC call that triggers memory corruption.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libvirt: 0.0.1 - 0.9.1

CPE2.3

• cpe:2.3:a:libvirt_org:libvirt:0.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:libvirt_org:libvirt:0.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:libvirt_org:libvirt:0.0.3:*:*:*:*:*:*:*

External links

https://libvirt.org/news.html
https://lists.fedoraproject.org/pipermail/package-announce/2011-July/062515.html
https://lists.fedoraproject.org/pipermail/package-announce/2011-July/062855.html
https://secunia.com/advisories/45375
https://secunia.com/advisories/45441
https://secunia.com/advisories/45446
https://www.debian.org/security/2011/dsa-2280
https://www.openwall.com/lists/oss-security/2011/06/28/9
https://www.redhat.com/support/errata/RHSA-2011-1019.html
https://www.redhat.com/support/errata/RHSA-2011-1197.html
https://www.securitytracker.com/id?1025822
https://www.ubuntu.com/usn/USN-1180-1
https://exchange.xforce.ibmcloud.com/vulnerabilities/68271
https://hermes.opensuse.org/messages/10027908
https://www.redhat.com/archives/libvir-list/2011-June/msg01278.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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