Medium severity · published Dec 20, 2018
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
5.5
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QE
Qemu · Qemu
through 3.1.0 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 18.04; 18.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20124
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-20124
Mailing List
http://www.openwall.com/lists/oss-security/2018/12/18/2
Third Party Advisory
http://www.securityfocus.com/bid/106290
Patch
https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg02822.html
Third Party Advisory
https://usn.ubuntu.com/3923-1/
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