Privilege escalation in Qemu
CVE-2020-35517
A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Qemu
- Qemu — versions qemu 5.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/qemu/qemu/commit/ebf101955ce8f8d72fba103b5151115a4335de2c (Patch, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- www.openwall.com/lists/oss-security/2021/01/22/1 (Exploit, Patch, Mailing List, Third Party Advisory)
- lists.gnu.org/archive/html/qemu-devel/2021-01/msg05461.html (Exploit, Patch, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210312-0002/ (Third Party Advisory)
- security.gentoo.org/glsa/202208-27 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-35517?
- CVE-2020-35517 is a high-severity vulnerability in Qemu, classified under Improper Privilege Management. CVSS score: 8.2/10. Published 2021-01-28.
- How severe is CVE-2020-35517?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2020-35517 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.