qemu: CVE-2022-4172: erst: undefined-behavior in memcpy in write_erst_record

Debian Bug report logs - #1025123
qemu: CVE-2022-4172: erst: undefined-behavior in memcpy in write_erst_record

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: qemu: CVE-2022-4172: erst: undefined-behavior in memcpy in write_erst_record

Date: Tue, 29 Nov 2022 22:07:24 +0100

Source: qemu
Version: 1:7.1+dfsg-2
Severity: important
Tags: security upstream
Forwarded: https://gitlab.com/qemu-project/qemu/-/issues/1268
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for qemu.

CVE-2022-4172[0]:
| An integer overflow and buffer overflow issues were found in the ACPI
| Error Record Serialization Table (ERST) device of QEMU in the
| read_erst_record() and write_erst_record() functions. Both issues may
| allow the guest to overrun the host buffer allocated for the ERST
| memory device. A malicious guest could use these flaws to crash the
| QEMU process on the host.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2022-4172
    https://www.cve.org/CVERecord?id=CVE-2022-4172
[1] https://gitlab.com/qemu-project/qemu/-/issues/1268
[2] https://gitlab.com/qemu-project/qemu/-/commit/defb70980f6bed36100b74e84220f1764c0dd544 

Regards,
Salvatore

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