Vulnerability Details : CVE-2018-20124
hw/rdma/rdma_backend.c in QEMU allows guest OS users to trigger out-of-bounds access via a PvrdmaSqWqe ring element with a large num_sge value.
Products affected by CVE-2018-20124
- 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:a:qemu:qemu:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-20124
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 23 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-20124
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-2018-20124
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-20124
-
http://www.securityfocus.com/bid/106290
QEMU 'hw/rdma/rdma_backend.c' Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
https://usn.ubuntu.com/3923-1/
USN-3923-1: QEMU vulnerabilities | Ubuntu security noticesThird Party Advisory
-
http://www.openwall.com/lists/oss-security/2018/12/18/2
oss-security - CVE-2018-20124 QEMU: rdma: OOB access when building scatter-gather arrayMailing List;Patch;Third Party Advisory
-
https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg02822.html
[Qemu-devel] [PATCH v2 1/6] rdma: check num_sge does not exceed MAX_SGEPatch;Third Party Advisory
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