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Bug 839762 (CVE-2021-3611, CVE-2021-3750, CVE-2021-3929, CVE-2021-4158, CVE-2021-4206, CVE-2021-4207, CVE-2022-0358) - <app-emulation/qemu-7.0.0: multiple vulnerabilities
Summary: <app-emulation/qemu-7.0.0: multiple vulnerabilities
Status: CONFIRMED
Alias: CVE-2021-3611, CVE-2021-3750, CVE-2021-3929, CVE-2021-4158, CVE-2021-4206, CVE-2021-4207, CVE-2022-0358
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
URL:
Whiteboard: B2 [stable]
Keywords:
Depends on: 839765
Blocks:
  Show dependency tree
 
Reported: 2022-04-21 01:10 UTC by John Helmert III
Modified: 2022-05-03 00:32 UTC (History)
5 users (show)

See Also:
Package list:
Runtime testing required: ---


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Description John Helmert III gentoo-dev Security 2022-04-21 01:10:38 UTC
RedHat has issued these numerous CVEs for QEMu despite
their not making the CVEs public.
Comment 1 John Helmert III gentoo-dev Security 2022-05-03 00:32:56 UTC
CVE-2021-3750 (https://gitlab.com/qemu-project/qemu/-/issues/556):
https://bugzilla.redhat.com/show_bug.cgi?id=1999073
https://gitlab.com/qemu-project/qemu/-/issues/541

A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0.