Red Hat Virtualization 4 update for qemu-kvm-rhev

1) Memory leak

EUVDB-ID: #VU27388

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

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

External links

http://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.