CVE-2019-12068 Information

Description

In QEMU 1:4.1-1 1:2.1+dfsg-12+deb8u6 1:2.8+dfsg-6+deb9u8 1:3.1+dfsg-8~deb10u1 1:3.1+dfsg-8+deb10u2 and 1:2.1+dfsg-12+deb8u12 (fixed) when executing script in lsi_execute_script() the LSI scsi adapter emulator advances ’s-dsp’ index to read next opcode. This can lead to an infinite loop if the next opcode is empty. Move the existing loop exit after 10k iterations so that it covers no-op opcodes as well.

CVSS Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00034.html http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00038.html https://git.qemu.org/?p=qemu.git;a=commit;h=de594e47659029316bbf9391efb79da0a1a08e08 https://lists.debian.org/debian-lts-announce/2019/09/msg00021.html https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html https://lists.gnu.org/archive/html/qemu-devel/2019-08/msg01518.html https://security-tracker.debian.org/tracker/CVE-2019-12068 https://usn.ubuntu.com/4191-1/ https://usn.ubuntu.com/4191-2/ https://www.debian.org/security/2020/dsa-4665

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

LOW

Base Severity

3.8