Bug 835607 (CVE-2022-26353, CVE-2022-26354) – <app-emulation/qemu-7.0.0: multiple vulnerabilities

• Product: Gentoo Security
• Status: RESOLVED FIXED

[Description John Helmert III 2022-03-19 03:56:16 UTC]

CVE-2022-26353 (https://lists.nongnu.org/archive/html/qemu-devel/2022-03/msg02438.html):

A flaw was found in the virtio-net device of QEMU. This flaw was inadvertently introduced with the fix for CVE-2021-3748, which forgot to unmap the cached virtqueue elements on error, leading to memory leakage and other unexpected results. Affected QEMU version: 6.2.0.

CVE-2022-26354 (https://gitlab.com/qemu-project/qemu/-/commit/8d1b247f3748ac4078524130c6d7ae42b6140aaf):

A flaw was found in the vhost-vsock device of QEMU. In case of error, an invalid element was not detached from the virtqueue before freeing its memory, leading to memory leakage and other unexpected results. Affected QEMU versions <= 6.2.0.

Fixed in 7.0.0-rc0.

[Comment 1 John Helmert III 2022-03-30 02:51:07 UTC]

CVE-2022-1050 (https://lists.nongnu.org/archive/html/qemu-devel/2022-03/msg05197.html):

Guest driver might execute HW commands when shared buffers are not yet allocated, potentially leading to a use-after-free condition.

The referenced patch doesn't seem to be upstreamed.

[Comment 2 John Helmert III 2022-04-20 15:31:32 UTC]

(In reply to John Helmert III from comment #0)
> CVE-2022-26353
> (https://lists.nongnu.org/archive/html/qemu-devel/2022-03/msg02438.html):
> 
> A flaw was found in the virtio-net device of QEMU. This flaw was
> inadvertently introduced with the fix for CVE-2021-3748, which forgot to
> unmap the cached virtqueue elements on error, leading to memory leakage and
> other unexpected results. Affected QEMU version: 6.2.0.

Also in 7.0.0.

> CVE-2022-26354
> (https://gitlab.com/qemu-project/qemu/-/commit/
> 8d1b247f3748ac4078524130c6d7ae42b6140aaf):
> 
> A flaw was found in the vhost-vsock device of QEMU. In case of error, an
> invalid element was not detached from the virtqueue before freeing its
> memory, leading to memory leakage and other unexpected results. Affected
> QEMU versions <= 6.2.0.
> 
> Fixed in 7.0.0-rc0.

[Comment 3 John Helmert III 2022-08-14 03:05:06 UTC]

(In reply to John Helmert III from comment #1)
> CVE-2022-1050
> (https://lists.nongnu.org/archive/html/qemu-devel/2022-03/msg05197.html):
> 
> Guest driver might execute HW commands when shared buffers are not yet
> allocated, potentially leading to a use-after-free condition.
> 
> The referenced patch doesn't seem to be upstreamed.

Popping this one out of this bug so we can proceed with the other issues here.

[Comment 4 John Helmert III 2022-08-14 04:42:29 UTC]

GLSA request filed

[Comment 5 Larry the Git Cow 2022-08-14 16:10:01 UTC]

The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/data/glsa.git/commit/?id=fd3b0a54cba850267bd5f7ed0ac9f66f91aa44ac

commit fd3b0a54cba850267bd5f7ed0ac9f66f91aa44ac
Author:     GLSAMaker <[e-mail]>
AuthorDate: 2022-08-14 16:09:07 +0000
Commit:     Sam James <[e-mail]>
CommitDate: 2022-08-14 16:09:43 +0000

    [ GLSA 202208-27 ] QEMU: Multiple Vulnerabilities
    
    Bug: https://bugs.gentoo.org/733448
    Bug: https://bugs.gentoo.org/736605
    Bug: https://bugs.gentoo.org/773220
    Bug: https://bugs.gentoo.org/775713
    Bug: https://bugs.gentoo.org/780816
    Bug: https://bugs.gentoo.org/792624
    Bug: https://bugs.gentoo.org/807055
    Bug: https://bugs.gentoo.org/810544
    Bug: https://bugs.gentoo.org/820743
    Bug: https://bugs.gentoo.org/835607
    Bug: https://bugs.gentoo.org/839762
    Signed-off-by: GLSAMaker <[e-mail]>
    Signed-off-by: Sam James <[e-mail]>

 glsa-202208-27.xml | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)

[Comment 6 Sam James 2022-08-14 16:12:31 UTC]

GLSA done, all done.