Out-of-bounds read in Red Hat Virtualization

1) Out-of-bounds read

EUVDB-ID: #VU50042

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-29443

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote user to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the ide_atapi_cmd_reply_end() function in hw/ide/atapi.c in QEMU. A remote user can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Virtualization Manager: 4.3

Red Hat Virtualization for IBM Power LE: 4

Red Hat Virtualization: 4

qemu-kvm-rhev (Red Hat package): before 2.12.0-48.el7_9.3

CPE2.3

• cpe:2.3:a:red_hat:red_hat_virtualization_manager:4.3:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_virtualization_for_ibm_power_le:4:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_virtualization:4:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:qemu-kvm-rhev_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*

External links

https://access.redhat.com/errata/RHSA-2021:2529

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.