Vulnerability Details : CVE-2016-1922
QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2016-1922
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
Threat overview for CVE-2016-1922
Top countries where our scanners detected CVE-2016-1922
Top open port discovered on systems with this issue
22
IPs affected by CVE-2016-1922 2
Threat actors abusing to this issue?
Yes
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attack surface intelligence
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Exploit prediction scoring system (EPSS) score for CVE-2016-1922
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 25 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2016-1922
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:N/I:N/A:P |
3.9
|
2.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2016-1922
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-1922
-
http://www.debian.org/security/2016/dsa-3469
Debian -- Security Information -- DSA-3469-1 qemuThird Party Advisory
-
http://www.securityfocus.com/bid/81058
QEMU 'i386/kvmvapic.c' NULL Pointer Dereference Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
http://www.openwall.com/lists/oss-security/2016/01/16/6
oss-security - Re: CVE request Qemu: i386: null pointer dereference in vapic_writeMailing List;Third Party Advisory
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http://www.debian.org/security/2016/dsa-3471
Debian -- Security Information -- DSA-3471-1 qemuThird Party Advisory
-
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.html
[Qemu-devel] [PULL] i386: avoid null pointer dereferencePatch;Vendor Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=1283934
1283934 – (CVE-2016-1922) CVE-2016-1922 Qemu: i386: null pointer dereference in vapic_write()Issue Tracking;Third Party Advisory
-
http://www.debian.org/security/2016/dsa-3470
Debian -- Security Information -- DSA-3470-1 qemu-kvmThird Party Advisory
-
http://www.openwall.com/lists/oss-security/2016/01/16/1
oss-security - CVE request Qemu: i386: null pointer dereference in vapic_writeMailing List;Third Party Advisory
-
https://security.gentoo.org/glsa/201604-01
QEMU: Multiple vulnerabilities (GLSA 201604-01) — Gentoo securityThird Party Advisory
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