An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions 2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host.
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1711
https://www.openwall.com/lists/oss-security/2020/01/23/3
https://lists.gnu.org/archive/html/qemu-devel/2020-01/msg05535.html
https://usn.ubuntu.com/4283-1/
https://access.redhat.com/errata/RHSA-2020:0669
https://access.redhat.com/errata/RHSA-2020:0730
https://access.redhat.com/errata/RHSA-2020:0731
https://access.redhat.com/errata/RHSA-2020:0773
https://lists.debian.org/debian-lts-announce/2020/03/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00007.html
https://security.gentoo.org/glsa/202005-02
https://lists.debian.org/debian-lts-announce/2020/09/msg00013.html
Source: MITRE
Published: 2020-02-11
Updated: 2022-04-05
Type: CWE-787
Base Score: 6
Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 6.8
Severity: MEDIUM
Base Score: 6
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
Impact Score: 3.7
Exploitability Score: 1.8
Severity: MEDIUM