CVE-2018-16872
What it is
A flaw was found in qemu Media Transfer Protocol (MTP). The code opening files in usb_mtp_get_object and usb_mtp_get_partial_object and directories in usb_mtp_object_readdir doesn't consider that the underlying filesystem may have changed since the time lstat(2) was called in usb_mtp_object_alloc, a classical TOCTTOU problem. An attacker with write access to the host filesystem shared with a guest can use this property to navigate the host filesystem in the context of the QEMU process and read any file the QEMU process has access to. Access to the filesystem may be local or via a network share protocol such as CIFS.
At a glance
- Exploitability
- Can be exploited over the network with a low-privilege account. High risk of data exposure.
- Exploit odds
- 1.1% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.1% in the next 30 days (EPSS).
- Severity: 5.3 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.1% · EPSS, next 30 days
- Weakness
- CWE-367
- Record status
- Modified
Affected
- Qemu ≤ 3.1.0
- Debian Linux 8.0
- Debian Linux 9.0
- Fedoraproject Fedora 29
- Fedoraproject Fedora 30
- Canonical Ubuntu Linux 14.04
- Canonical Ubuntu Linux 16.04
- Canonical Ubuntu Linux 18.04
Attack profile CVSS 3.1 · 5.3
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2018-16872.md and follow it. Check whether this project is affected by CVE-2018-16872. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16872
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16872
References
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html
- http://www.securityfocus.com/bid/106212
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16872
- https://lists.debian.org/debian-lts-announce/2019/02/msg00041.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CGCFIFSIWUREEQQOZDZFBYKWZHXCWBZN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJMTVGDLA654HNCDGLCUEIP36SNJEKK7/
- https://seclists.org/bugtraq/2019/May/76
- https://usn.ubuntu.com/3923-1/
- https://www.debian.org/security/2019/dsa-4454
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html
- http://www.securityfocus.com/bid/106212
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16872
- https://lists.debian.org/debian-lts-announce/2019/02/msg00041.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CGCFIFSIWUREEQQOZDZFBYKWZHXCWBZN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJMTVGDLA654HNCDGLCUEIP36SNJEKK7/
- https://seclists.org/bugtraq/2019/May/76
- https://usn.ubuntu.com/3923-1/
- https://www.debian.org/security/2019/dsa-4454