systemd Multiple Vulnerabilities

Date Disclosed:
9/20/2013

Date Patched:
No patch available.

Vendor:
Red Hat
Affected Software:
systemd 208 and prior
Description:

Multiple vulnerabilities exist within systemd:

CVE-2013-4391: An integer overflow allows a buffer overflow within systemd, which could be exploited by a remote attacker to cause a denial of service or execute arbitrary remote code within the context of the daemon's user.

CVE-2013-4392: A race condition in systemd could allow a local attacker to modify permissions in a way so as to elevate their permissions on the system.

CVE-2013-4393: A denial of service vulnerability within systemd, specifically in the journald functionality, could allow a local attacker to prevent users from being able to log in.

CVE-2013-4394: An elevation of privelege vulnerability exists within systemd, due to the way SetX11Keyboard() sanitized X Keyboard Extension layouts descriptions.

Severity:
High
Code Execution:
Yes. CVE-2013-4391 permits remote code execution.
Impact:

Local Elevation of Privilege (CVE-2013-4392 and CVE-2013-4394)

Local attackers exploiting this vulnerability will be able to elevate their privileges on a system. Attackers will likely leverage this to hide their presence on the compromised system.

 

Remote Code Execution (CVE-2013-4391)

Exploitation of this vulnerability is possible by forming a malicious request and sending it to the affected server. Remote attackers who successfully exploit this vulnerability will be able to execute arbitrary commands on the vulnerable system with the same rights as the web service.

 

Denial of Service (CVE-2013-4393)

Exploitation of this vulnerability will render the service on the affected system unresponsive for a limited time. This is a permanent denial of service, so attackers do not need to continue attacking the system to maintain the denial of service condition.

Mitigation:
No mitigations exist.
Protection:
BeyondTrust's Retina® Network Security Scanner scans devices to detect for this vulnerability.

• 30979 - systemd Multiple Vulnerabilities (20131009) (Zero-Day)

Links:

• Original Advisory for CVE-2013-4391
• Original Advisory for CVE-2013-4392
• Original Advisory for CVE-2013-4393
• Original Advisory for CVE-2013-4394

Status:

2013-09-20: Original Disclosure (CVE-2013-4391, CVE-2013-4392, and CVE-2013-4393)

2013-10-02: Original Disclosure (CVE-2013-4394)