CVE-2018-20124 — Out-of-bounds Read in Qemu

CWE-125 — Out-of-bounds ReadCWE-787 — Out-of-bounds Write9 documents7 sources
Severity
5.5MEDIUMNVD
OSV7.8
EPSS
0.2%
top 64.22%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
QemuDebian QemuCanonical Ubuntu Linux
Timeline
PublishedDec 20
Latest updateMay 13

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:HExploitability: 1.8 | Impact: 3.6

Affected Packages4 packages

▶debiandebian/qemu< qemu 1:4.1-1 (bookworm)
▶Debianqemu/qemu< 1:4.1-1+3
▶Ubuntuqemu/qemu< 2.0.0+dfsg-2ubuntu1.45+2
▶NVDqemu/qemu3.1.0

Also affects: Ubuntu Linux 14.04, 16.04, 18.04, 18.10

Patches

Patch: www.openwall.com ↗Patch: lists.gnu.org ↗Patch: www.openwall.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-rq7v-8fqq-9fwv: hw/rdma/rdma_backend↗2022-05-13
▶
OSV
qemu vulnerabilities↗2019-03-27
▶
OSV
CVE-2018-20124: hw/rdma/rdma_backend↗2018-12-20
▶

📋Vendor Advisories

3
Ubuntu
QEMU vulnerabilities↗2019-03-27
▶
Red Hat
QEMU: rdma: OOB access when building scatter-gather array↗2018-12-11
▶
Debian
CVE-2018-20124: qemu - hw/rdma/rdma_backend.c in QEMU allows guest OS users to trigger out-of-bounds ac...↗2018
▶

💬Community

2
Bugzilla
CVE-2018-20124 qemu: rdma: OOB access when building scatter-gather array [fedora-all]↗2018-12-18
▶
Bugzilla
CVE-2018-20124 QEMU: rdma: OOB access when building scatter-gather array↗2018-12-18
▶