Vulnerability Details : CVE-2018-20191
hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2018-20191
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
- cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-20191
0.85%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 82 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-20191
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2018-20191
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-20191
-
https://usn.ubuntu.com/3923-1/
USN-3923-1: QEMU vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KJMTVGDLA654HNCDGLCUEIP36SNJEKK7/
[SECURITY] Fedora 30 Update: qemu-3.1.0-6.fc30 - package-announce - Fedora Mailing-ListsBroken Link
-
http://www.openwall.com/lists/oss-security/2018/12/18/1
oss-security - CVE-2018-20191 QEMU: pvrdma: uar_read leads to NULL dereferenceMailing List;Patch;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CGCFIFSIWUREEQQOZDZFBYKWZHXCWBZN/
[SECURITY] Fedora 29 Update: qemu-3.0.0-4.fc29 - package-announce - Fedora Mailing-ListsBroken Link
-
http://www.securityfocus.com/bid/106276
QEMU CVE-2018-20191 Local Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg03066.html
Re: [Qemu-devel] [PATCH v2 2/6] pvrdma: add uar_read routinePatch;Third Party Advisory
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