CVE-2018-20191 — NULL Pointer Dereference in Qemu

CWE-476 — NULL Pointer Dereference9 documents7 sources
Severity
7.5HIGHNVD
OSV7.8
EPSS
0.7%
top 27.40%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
QemuDebian QemuCanonical Ubuntu Linux+1 more
Timeline
PublishedDec 20
Latest updateMay 13

Description

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).

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | 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: Fedora 29, 30, 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-h5wg-wcrq-7mp8: hw/rdma/vmw/pvrdma_main↗2022-05-13
▶
OSV
qemu vulnerabilities↗2019-03-27
▶
OSV
CVE-2018-20191: hw/rdma/vmw/pvrdma_main↗2018-12-20
▶

📋Vendor Advisories

3
Ubuntu
QEMU vulnerabilities↗2019-03-27
▶
Red Hat
QEMU: pvrdma: uar_read leads to NULL dereference↗2018-12-11
▶
Debian
CVE-2018-20191: qemu - hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as u...↗2018
▶

💬Community

2
Bugzilla
CVE-2018-20191 QEMU: pvrdma: uar_read leads to NULL dereference↗2018-12-18
▶
Bugzilla
CVE-2018-20191 qemu: pvrdma: uar_read leads to NULL dereference [fedora-all]↗2018-12-18
▶