CVE-2019-3464

Insufficient sanitization of environment variables passed to rsync can bypass the restrictions imposed by rssh, a restricted shell that should restrict users to perform only rsync operations, resulting in the execution of arbitrary shell commands.

Weakness

The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.

Affected Software

Name	Vendor	Start Version	End Version
Rssh	Pizzashack	2.3.4 (including)	2.3.4 (including)
Rssh	Ubuntu	bionic	*
Rssh	Ubuntu	cosmic	*
Rssh	Ubuntu	esm-apps/bionic	*
Rssh	Ubuntu	esm-apps/xenial	*
Rssh	Ubuntu	esm-infra-legacy/trusty	*
Rssh	Ubuntu	trusty	*
Rssh	Ubuntu	trusty/esm	*
Rssh	Ubuntu	upstream	*
Rssh	Ubuntu	xenial	*

Potential Mitigations

Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
For example, in Java, if the programmer does not explicitly initialize a variable, then the code could produce a compile-time error (if the variable is local) or automatically initialize the variable to the default value for the variable’s type. In Perl, if explicit initialization is not performed, then a default value of undef is assigned, which is interpreted as 0, false, or an equivalent value depending on the context in which the variable is accessed.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2019-3464
CWE	https://cwe.mitre.org/data/definitions/665.html

Improper Initialization

Weakness

Affected Software

Potential Mitigations

References

CVE-2019-3464

Improper Initialization

Weakness

Affected Software

Potential Mitigations

Related Attack Patterns

References