Vulnerability Description
qmp_guest_file_read in qga/commands-posix.c and qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an integer overflow causing a g_malloc0() call to trigger a segmentation fault when trying to allocate a large memory chunk. The vulnerability can be exploited by sending a crafted QMP command (including guest-file-read with a large count value) to the agent via the listening socket.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | <= 2.12.50 |
| Canonical | Ubuntu Linux | 14.04 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/104531Third Party AdvisoryVDB Entry
- https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/02/msg00041.htmlMailing ListThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.htmlMailing ListPatchThird Party Advisory
- https://seclists.org/bugtraq/2019/May/76Mailing ListThird Party Advisory
- https://usn.ubuntu.com/3826-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4454Third Party Advisory
- https://www.exploit-db.com/exploits/44925/ExploitThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/104531Third Party AdvisoryVDB Entry
- https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/02/msg00041.htmlMailing ListThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.htmlMailing ListPatchThird Party Advisory
- https://seclists.org/bugtraq/2019/May/76Mailing ListThird Party Advisory
- https://usn.ubuntu.com/3826-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4454Third Party Advisory
FAQ
What is CVE-2018-12617?
CVE-2018-12617 is a vulnerability with a CVSS score of 7.5 (HIGH). qmp_guest_file_read in qga/commands-posix.c and qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an integer overflow causing a g_malloc0() call to trigger a segmentation faul...
How severe is CVE-2018-12617?
CVE-2018-12617 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-12617?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu, Canonical Ubuntu Linux, Debian Debian Linux.