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4.9 Medium

CVE-2023-6693 Qemu: virtio-net: stack buffer overflow in virtio_net_flush_tx()

Description

A stack based buffer overflow was found in the virtio-net device of QEMU. This issue occurs when flushing TX in the virtio_net_flush_tx function if guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and VIRTIO_NET_F_MRG_RXBUF are enabled. This could allow a malicious user to overwrite local variables allocated on the stack. Specifically, the `out_sg` variable could be used to read a part of process memory and send it to the wire, causing an information leak.

CVSS 3.1 detail

Vector CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Exploitable with local access to the machine, without an account and without any user action; the impact on data or service is limited.

Attack vector
Local
Attack complexity
High
Privileges required
None
Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 8 8100020240314161907 earliest → < 8100020240314161907.e155f54d 8100020240314161907.e155f54d
Red Hat Enterprise Linux 9 Versions not published
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 Advanced Virtualization Versions not published

References

Timeline

  1. Published
  2. Last modified

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