SB2021110202 - Improper input validation in Unicode character definitions

Description

This security bulletin contains information about 1 security vulnerability.

1) Input validation error (CVE-ID: CVE-2021-42694)

The vulnerability allows an attacker to bypass certain security checks.

The vulnerability exists in the character definitions of the Unicode Specification. The specification allows an attacker to produce source code identifiers such as function names using homoglyphs that render visually identical to a target identifier. Adversaries can leverage this to inject code via adversarial identifier definitions in upstream software dependencies invoked deceptively in downstream software.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://trojansource.codes
• http://www.openwall.com/lists/oss-security/2021/11/01/1
• http://www.openwall.com/lists/oss-security/2021/11/01/6