Red Hat Enterprise Linux 8.1 Extended Update Support update for edk2

1) Buffer overflow

EUVDB-ID: #VU56490

Risk: Medium

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

CVE-ID: CVE-2021-38575

CWE-ID: CWE-119 - Memory corruption

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 in the IScsiHexToBin() function in NetworkPkg/IScsiDxe. A remote attacker with ability to inject data into communication between edk2 and the iSCSI target can execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

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

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

edk2 (Red Hat package): before 20190308git89910a39dcfd-6.el8_1.1

External links

http://access.redhat.com/errata/RHSA-2021:3172

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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