APC warns of important unauthenticated RCE flaws in UPS software program

APC UPS in a server rack

APC’s Simple UPS On-line Monitoring Software program is weak to unauthenticated arbitrary distant code execution, permitting hackers to take over gadgets and, in a worst-case situation, disabling its performance altogether.

Uninterruptible Energy Provide (UPS) gadgets are very important in safeguarding knowledge facilities, server farms, and smaller community infrastructures by guaranteeing seamless operation amidst energy fluctuations or outages.

APC (by Schneider Electrical) is among the hottest UPS manufacturers. Its merchandise are broadly deployed on each the buyer and company markets, together with governmental, healthcare, industrial, IT, and retail infrastructure.

Earlier this month, the seller printed a safety notification to warn concerning the following three flaws impacting its merchandise:

  • CVE-2023-29411: Lacking authentication for important operate permitting an attacker to vary admin credentials and execute arbitrary code on the Java RMI interface. (CVSS v3.1 rating: 9.8, “important”)
  • CVE-2023-29412: Improper dealing with of case sensitivity permitting an attacker to run arbitrary code when manipulating inner strategies by the Java RMI interface. (CVSS v3.1 rating: 9.8, “important”)
  • CVE-2023-29413: Lacking authentication for important operate that might result in an unauthenticated attacker imposing a denial-of-service (DoS) situation. (CVSS v3.1 rating: 7.5, “excessive”)

Whereas denial-of-service (DoS) flaws are typically not thought of very harmful, as many UPS gadgets are positioned in knowledge facilities, the results of such an outage are magnified because it might block the distant administration of gadgets.

The above flaws impression:

  • APC Simple UPS On-line Monitoring Software program v2.5-GA-01-22320 and earlier
  • Schneider Electrical Simple UPS On-line Monitoring Software program v2.5-GA-01-22320 and earlier

The impression impacts all Home windows variations, together with 10 and 11, and likewise Home windows Server 2016, 2019, and 2022.

The beneficial motion for customers of the impacted software program is to improve to V2.5-GS-01-23036 or later, accessible for obtain from right here (APCSE).

At present, the one mitigation for patrons with direct entry to their Simple UPS items is to improve to the PowerChute Serial Shutdown (PCSS) software program suite on all servers protected by your Simple UPS OnLine (SRV, SRVL fashions), which supplies serial shutdown and monitoring.

Basic safety suggestions supplied by the seller embody inserting mission-critical internet-connected gadgets behind firewalls, using VPNs for distant entry, implementing strict bodily entry controls, and avoiding leaving gadgets in “Program” mode.

Current analysis specializing in APC merchandise revealed harmful flaws collectively referred to as ‘TLStorm,’ which might give hackers management of weak and uncovered UPS gadgets.

Quickly after the publication of TLStorm, CISA warned of assaults focusing on internet-connected UPS gadgets, urging customers to take fast motion to dam the assaults and defend their gadgets.

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