This security advisory describes one low risk vulnerability.
1) OS Command Injection
The vulnerability allows a local user to execute arbitrary shell commands on the target system.
The vulnerability exists in the way ksh evaluates certain environment variables . A local user can set a specially crafted environment variable and execute arbitrary OS commands on the target system.
Install updates from vendor’s website.
Vulnerable software versions
Red Hat Enterprise Linux for x86_64 – Extended Update Support:
Red Hat Enterprise Linux for Power, little endian – Extended Update Support:
Red Hat Enterprise Linux for Power, big endian – Extended Update Support:
Red Hat Enterprise Linux for IBM z Systems – Extended Update Support:
ksh (Red Hat package):
Red Hat Enterprise Linux EUS Compute Node:
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.