Improper input validation in Qemu
CVE-2017-7539
An assertion-failure flaw was found in Qemu before 2.10.1, in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.055 (92.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd 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: 0.055 · newest: 0.055 · change: 0.000
Affected products
- Qemu — versions 2.10.1
- Red Hat Enterprise Linux — versions 7.0
- Red Hat OpenStack — versions 6.0, 7.0, 8
- Red Hat Virtualization — versions 4.0, 3.0
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2017:2628 (vendor-advisory, Third Party Advisory)
- git.qemu.org/
- access.redhat.com/errata/RHSA-2017:3473 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:3470 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:3472 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:3474 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:3471 (vendor-advisory, Third Party Advisory)
- git.qemu.org/
- www.openwall.com/lists/oss-security/2017/07/21/4 (mailing-list, Patch, Mailing List, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:3466 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-7539?
- CVE-2017-7539 is a medium-severity vulnerability in Qemu, classified under Reachable Assertion. CVSS score: 5.3/10. Published 2018-07-26.
- How severe is CVE-2017-7539?
- Medium severity. CVSS v3 base score is 5.3 out of 10.