Out-of-bounds Read in Qemu
CVE-2020-14364
An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before 5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its 'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the privileges of the QEMU process on the host.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.054 (92.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.054 · newest: 0.054 · change: 0.000
Affected products
- Qemu
- Canonical Ubuntu Linux — versions 16.04, 18.04, 20.04
- Debian Linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 31, 32
- openSUSE Leap — versions 15.2
- Red Hat Enterprise Linux — versions 6.0, 7.0, 8.0
- Red Hat OpenStack — versions 10, 13
- Qemu — versions QEMU versions before 5.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- www.openwall.com/lists/oss-security/2020/08/24/3 (Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/08/24/2 (Mailing List, Third Party Advisory)
- www.debian.org/security/2020/dsa-4760 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2020/09/msg00013.html (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- usn.ubuntu.com/4511-1/ (vendor-advisory, Third Party Advisory)
- security.netapp.com/advisory/ntap-20200924-0006/ (Third Party Advisory)
- security.gentoo.org/glsa/202009-14 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-14364?
- CVE-2020-14364 is a medium-severity vulnerability in Qemu, classified under Out-of-bounds Read. CVSS score: 5.0/10. Published 2020-08-31.
- How severe is CVE-2020-14364?
- Medium severity. CVSS v3 base score is 5.0 out of 10.
- Is CVE-2020-14364 known to be exploited?
- 21 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.