Red Hat Virtualization 4 update for qemu-kvm-rhev

1) Memory leak

EUVDB-ID: #VU27388

Risk: Medium

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

CVE-ID: CVE-2019-20382

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the zrle_compress_data() function in ui/vnc-enc-zrle.c during a VNC disconnect operation because libz is misused, resulting in a situation where memory allocated in deflateInit2 is not freed in deflateEnd. A remote attacker can perform a denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

qemu-kvm-rhev (Red Hat package): 2.12.0-18.el7 - 2.12.0-44.el7_8.1

Red Hat Virtualization Manager: 4.3

CPE2.3

• cpe:2.3:o:red_hat:qemu-kvm-rhev_redhat_package:2.12.0-18.el7:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:qemu-kvm-rhev_redhat_package:2.12.0-18.el7_6:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:qemu-kvm-rhev_redhat_package:2.12.0-18.el7_6.11:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:red_hat_virtualization_manager:4.3:*:*:*:*:*:*:*

External links

https://access.redhat.com/errata/RHSA-2020:3267

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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