ALAS-2019-1328


Amazon Linux AMI Security Advisory: ALAS-2019-1328
Advisory Release Date: 2019-12-19 23:35 Pacific
Severity: Important

Issue Overview:

Insufficient sanitation 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. (CVE-2019-3464 )

Insufficient sanitation of arguments 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. (CVE-2019-3463 )

rssh version 2.3.4 contains a CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability in 'allowscp' permission that can result in Local command execution. This attack appear to be exploitable via An authorized SSH user with the 'allowscp' permission. (CVE-2019-1000018 )


Affected Packages:

rssh


Issue Correction:
Run yum update rssh to update your system.

New Packages:
i686:
    rssh-2.3.4-15.3.amzn1.i686
    rssh-debuginfo-2.3.4-15.3.amzn1.i686

src:
    rssh-2.3.4-15.3.amzn1.src

x86_64:
    rssh-debuginfo-2.3.4-15.3.amzn1.x86_64
    rssh-2.3.4-15.3.amzn1.x86_64