CVE-2020-12829: Integer Overflow
First published: Fri Feb 28 2020(Updated: )
An out-of-bounds read/write vulnerability was found in function Sm501_2d_operation() in hw/display/sm501.c. The OOB flaw is caused by an integer overflow in COPY_AREA when the `rtl` parameter is set to 1, and either `src_y` or `src_x` is less than `operation_height`. Please refer to the following duplicate bug for further details: <a class="bz_bug_link bz_status_CLOSED bz_closed bz_public " title="CLOSED DUPLICATE - QEMU: sm501_2d_operation() in hw/display/sm501.c allows out-of-bounds write and read operations.(CVE request)" href="show_bug.cgi?id=1786026">https://bugzilla.redhat.com/show_bug.cgi?id=1786026</a>. Upstream fix: <a href="https://git.qemu.org/?p=qemu.git;a=commit;h=b15a22bbcbe6a78dc3d88fe3134985e4cdd87de4">https://git.qemu.org/?p=qemu.git;a=commit;h=b15a22bbcbe6a78dc3d88fe3134985e4cdd87de4</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU qemu | <=5.0.1 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =20.04 | |
| Debian Debian Linux | =10.0 | |
| debian/qemu | 1:5.2+dfsg-11+deb11u3 1:5.2+dfsg-11+deb11u2 1:7.2+dfsg-7+deb12u7 1:9.1.1+ds-2 1:9.1.1+ds-4 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1808510
- https://bugzilla.redhat.com/show_bug.cgi?id=1786026
- https://security-tracker.debian.org/tracker/CVE-2020-13754
- https://security-tracker.debian.org/tracker/CVE-2020-15863
- https://security-tracker.debian.org/tracker/CVE-2020-12829
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=961451
- https://usn.ubuntu.com/4467-1/
- https://www.debian.org/security/2020/dsa-4760
- https://launchpad.net/bugs/cve/CVE-2020-12829
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1786026
- https://git.qemu.org/?p=qemu.git;a=commit;h=b15a22bbcbe6a78dc3d88fe3134985e4cdd87de4
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1819670
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1819669
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1819671
- https://access.redhat.com/security/cve/CVE-2020-12829
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12829
- https://nvd.nist.gov/vuln/detail/CVE-2020-12829
- https://ubuntu.com/security/CVE-2020-12829
Frequently Asked Questions
What is CVE-2020-12829?
CVE-2020-12829 is a vulnerability in the SM501 display driver implementation in QEMU.
What is the severity of CVE-2020-12829?
The severity of CVE-2020-12829 is low with a CVSS score of 3.8.
Which software versions are affected by CVE-2020-12829?
QEMU versions up to 5.0.0 are affected by CVE-2020-12829.
How can a local attacker abuse CVE-2020-12829?
A local attacker can abuse CVE-2020-12829 to crash the QEMU process.
Where can I find more information about CVE-2020-12829?
More information about CVE-2020-12829 can be found at the following references: [Bugzilla](https://bugzilla.redhat.com/show_bug.cgi?id=1808510), [Ubuntu USN](https://usn.ubuntu.com/4467-1/), [Debian DSA](https://www.debian.org/security/2020/dsa-4760).
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