Red Hat Enterprise Linux 7 update for hivex

1) Out-of-bounds read

EUVDB-ID: #VU54109

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3504

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition within the hivex_open() function when processing a Windows Registry (hive) file. A remote attacker can create a specially crafted Windows Registry (hive) file, trick the victim into opening it, trigger out-of-bounds read error and crash the application that us using the affected library.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux for Power, little endian: 7

Red Hat Enterprise Linux for IBM z Systems: 7

Red Hat Enterprise Linux Desktop: 7

Red Hat Enterprise Linux Workstation: 7

Red Hat Enterprise Linux Server: 7

hivex (Red Hat package): before 1.3.10-6.11.el7_9

External links

http://access.redhat.com/errata/RHSA-2021:2318

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.