Red Hat Enterprise Linux 8 update for the virt:rhel module

1) Heap-based buffer overflow

EUVDB-ID: #VU20446

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-14378

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the ip_reass() function in ip_input.c in libslirp. A remote authenticated attacker can send a large packet, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support: 8.1 - 8.6

Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support: 8.1 - 8.6

Red Hat Enterprise Linux for x86_64 - Extended Update Support: 8.1 - 8.6

Red Hat Enterprise Linux Server - AUS: 8.2 - 8.6

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support: 8.1 - 8.6

Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 8.1 - 8.6

Red Hat Enterprise Linux for ARM 64 - Extended Update Support: 8.1 - 8.6

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 8.0 - 8.6

Red Hat Enterprise Linux Server - TUS: 8.2 - 8.6

Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support: 8.4

Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support: 8.1 - 8.4

Red Hat CodeReady Linux Builder for IBM z Systems: 8.0

Red Hat CodeReady Linux Builder for ARM 64: 8.0

Red Hat CodeReady Linux Builder for Power, little endian: 8.0

Red Hat CodeReady Linux Builder for x86_64: 8.0

Red Hat Enterprise Linux for ARM 64: 8

Red Hat Enterprise Linux for Power, little endian: 8

Red Hat Enterprise Linux for IBM z Systems: 8

Red Hat Enterprise Linux for x86_64: 8.0

External links

http://access.redhat.com/errata/RHBA-2019:2715

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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