Red Hat Enterprise Linux 7.6 update for nss



Published: 2021-12-06
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-43527
CWE-ID CWE-122
Exploitation vector Network
Public exploit N/A
Vulnerable software
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nss (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux Server - TUS
Operating systems & Components / Operating system

Red Hat Enterprise Linux Server - AUS
Operating systems & Components / Operating system

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Heap-based buffer overflow

EUVDB-ID: #VU58477

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-43527

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 when handling DER-encoded DSA or RSA-PSS signatures. A remote attacker can send specially crafted signatures encoded within CMS, S/MIME, PKCS #7, or PKCS #12 to the application, 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

nss (Red Hat package): 3.36.0-9.el7_6

Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server - TUS: 7.6

Red Hat Enterprise Linux Server - AUS: 7.6


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:4933

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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