CVE-2018-12617
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 25.1%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 25.05% probability · 98th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-190
- Affected
- qemu/qemu · canonical/ubuntu linux · debian/debian linux
- Source
- cve@mitre.org
References
- http://www.securityfocus.com/bid/104531Third Party Advisory, VDB Entry
- https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/02/msg00041.htmlMailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.htmlMailing List, Patch, Third Party Advisory
- https://seclists.org/bugtraq/2019/May/76Mailing List, Third 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/Exploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/104531Third Party Advisory, VDB Entry
- https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/02/msg00041.htmlMailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.htmlMailing List, Patch, Third Party Advisory
- https://seclists.org/bugtraq/2019/May/76Mailing List, Third 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/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.