A qemu security update has been released for Debian GNU/Linux 10 LTS to address multiple security issues.
DLA 3362-1: qemu security update
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Debian LTS Advisory DLA-3362-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Sylvain Beucler
March 14, 2023 https://wiki.debian.org/LTS
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Package : qemu
Version : 1:3.1+dfsg-8+deb10u10
CVE ID : CVE-2020-14394 CVE-2020-29130 CVE-2021-3592 CVE-2021-3593
CVE-2021-3594 CVE-2021-3595 CVE-2022-0216 CVE-2022-1050
Debian Bug : 970937 979677 986795 989993 989994 989995 989996 1014589 1014590
Multiple security issues were discovered in QEMU, a fast processor
emulator, which could result in denial of service, information leak,
or potentially the execution of arbitrary code.
CVE-2020-14394
An infinite loop flaw was found in the USB xHCI controller
emulation of QEMU while computing the length of the Transfer
Request Block (TRB) Ring. This flaw allows a privileged guest user
to hang the QEMU process on the host, resulting in a denial of
service.
CVE-2020-17380/CVE-2021-3409
A heap-based buffer overflow was found in QEMU in the SDHCI device
emulation support. It could occur while doing a multi block SDMA
transfer via the sdhci_sdma_transfer_multi_blocks() routine in
hw/sd/sdhci.c. A guest user or process could use this flaw to
crash the QEMU process on the host, resulting in a denial of
service condition, or potentially execute arbitrary code with
privileges of the QEMU process on the host.
CVE-2020-29130
slirp.c has a buffer over-read because it tries to read a certain
amount of header data even if that exceeds the total packet
length.
CVE-2021-3592
An invalid pointer initialization issue was found in the SLiRP
networking implementation of QEMU. The flaw exists in the
bootp_input() function and could occur while processing a udp
packet that is smaller than the size of the 'bootp_t' structure. A
malicious guest could use this flaw to leak 10 bytes of
uninitialized heap memory from the host.
CVE-2021-3593
An invalid pointer initialization issue was found in the SLiRP
networking implementation of QEMU. The flaw exists in the
udp6_input() function and could occur while processing a udp
packet that is smaller than the size of the 'udphdr'
structure. This issue may lead to out-of-bounds read access or
indirect host memory disclosure to the guest.
CVE-2021-3594
An invalid pointer initialization issue was found
in the SLiRP networking implementation of QEMU. The flaw exists in
the udp_input() function and could occur while processing a udp
packet that is smaller than the size of the 'udphdr'
structure. This issue may lead to out-of-bounds read access or
indirect host memory disclosure to the guest.
CVE-2021-3595
An invalid pointer initialization issue was found in the SLiRP
networking implementation of QEMU. The flaw exists in the
tftp_input() function and could occur while processing a udp
packet that is smaller than the size of the 'tftp_t'
structure. This issue may lead to out-of-bounds read access or
indirect host memory disclosure to the guest.
CVE-2022-0216
A use-after-free vulnerability was found in the LSI53C895A SCSI
Host Bus Adapter emulation of QEMU. The flaw occurs while
processing repeated messages to cancel the current SCSI request
via the lsi_do_msgout function. This flaw allows a malicious
privileged user within the guest to crash the QEMU process on the
host, resulting in a denial of service.
CVE-2022-1050
A flaw was found in the QEMU implementation of VMWare's
paravirtual RDMA device. This flaw allows a crafted guest driver
to execute HW commands when shared buffers are not yet allocated,
potentially leading to a use-after-free condition.
Note: PVRDMA is disabled in buster, but this was fixed
preventively in case this changes in the future.
For Debian 10 buster, these problems have been fixed in version
1:3.1+dfsg-8+deb10u10.
We recommend that you upgrade your qemu packages.
For the detailed security status of qemu please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/qemu
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
