Vulnerability Details : CVE-2010-0309
The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in i8254.c in KVM 83 does not properly use the pit_state data structure, which allows guest OS users to cause a denial of service (host OS crash or hang) by attempting to read the /dev/port file.
Vulnerability category: Denial of service
Exploit prediction scoring system (EPSS) score for CVE-2010-0309
Probability of exploitation activity in the next 30 days: 0.35%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 71 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2010-0309
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:L/Au:S/C:N/I:N/A:C |
8.0
|
6.9
|
NIST |
CWE ids for CVE-2010-0309
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Assigned by: nvd@nist.gov (Primary)
References for CVE-2010-0309
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http://www.openwall.com/lists/oss-security/2010/02/02/1
oss-security - CVE request - kvm: cat /dev/port in the guest can cause host DoS
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https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11095
Repository / Oval Repository
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https://rhn.redhat.com/errata/RHSA-2010-0088.html
RHSA-2010:0088 - Security Advisory - Red Hat Customer PortalVendor Advisory
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http://www.ubuntu.com/usn/USN-914-1
USN-914-1: Linux kernel vulnerabilities | Ubuntu security notices
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https://bugzilla.redhat.com/show_bug.cgi?id=560887
560887 – (CVE-2010-0309) CVE-2010-0309 kvm: cat /dev/port in guest cause the host hang
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http://www.debian.org/security/2010/dsa-1996
Debian -- Security Information -- DSA-1996-1 linux-2.6
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http://www.mail-archive.com/kvm%40vger.kernel.org/msg28002.html
KVM: PIT: control word is write-only
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http://www.vupen.com/english/advisories/2010/0638
Webmail | OVH- OVH
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https://rhn.redhat.com/errata/RHSA-2010-0095.html
RHSA-2010:0095 - Security Advisory - Red Hat Customer PortalPatch;Vendor Advisory
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http://www.securityfocus.com/bid/38158
Linux Kernel KVM Multiple Privilege Escalation and Denial of Service Vulnerabilities
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http://www.openwall.com/lists/oss-security/2010/02/02/4
oss-security - Re: CVE request - kvm: cat /dev/port in the guest can cause host DoS
Products affected by CVE-2010-0309
- cpe:2.3:a:linux:kernel:*:*:*:*:*:*:*:*