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Cisco ISE Vulnerabilities Can Be Chained in One-Click on Exploit

By Ionut Arghire on November 28, 2022

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A number of vulnerabilities in Cisco Id Providers Engine (ISE) might permit distant attackers to inject arbitrary instructions, bypass current safety protections, or carry out cross-site scripting (XSS) assaults.

An identity-based community entry management (NAC) and coverage enforcement system, Cisco ISE permits directors to manage endpoint entry and handle community gadgets.

A complete of 4 vulnerabilities have been recognized by a researcher in ISE, the exploitation of all requiring an attacker to be a legitimate and approved consumer of the ISE system.

Essentially the most extreme of those vulnerabilities is CVE-2022-20964, a command injection bug in ISE’s web-based administration interface tcpdump function. The high-severity bug exists as a result of consumer enter isn’t correctly validated.

“An attacker with privileges enough to entry the tcpdump function might exploit this vulnerability by manipulating requests to the web-based administration interface to comprise working system instructions,” Cisco explains in an advisory.

Profitable exploitation of this vulnerability might permit an attacker to execute arbitrary instructions on the underlying working system. If chained with different flaws, the bug might permit the attacker to raise privileges to root and probably take over the susceptible system.

In accordance with Yoroi safety researcher Davide Virruso, who found the vulnerabilities, Cisco underscored the influence that CVE-2022-20964 has on confidentiality, integrity, and availability, provided that the safety flaw may be exploited to realize root shell on the working system.

By chaining CVE-2022-20964 with CVE-2022-20959, an XSS flaw in ISE that Cisco patched in October, an attacker might simply get hold of a distant root shell on the susceptible system, the safety researcher advised SecurityWeek.

“It solely takes one click on of the sufferer on the hyperlink to get a shell because the system root consumer,” Virruso mentioned.

Tracked as CVE-2022-20965, one other bug is described as an entry bypass within the web-based administration interface. In accordance with Virruso, this entry management problem expands the assault floor of the chained exploits, exposing many customers to assaults.

By exploiting this vulnerability, “an authenticated, distant attacker is ready to carry out downloads of information generated by the perform, resulting in the disclosure of knowledge that she or he shouldn’t be in a position to entry,” Yoroi explains.

The remaining safety defects – CVE-2022-20966 and CVE-2022-20967 – might result in XSS assaults. The 2 flaws had been recognized within the tcpdump and Exterior RADIUS Server options of the web-based administration interface, respectively.

An attacker exploiting these vulnerabilities might retailer malicious HTML or script code throughout the software interface and use that code for XSS assaults.

Cisco says that patches addressing these vulnerabilities are deliberate for the primary quarter of 2023, within the type of Cisco ISE releases 3.1p6 and three.2p1.

The tech large encourages prospects to contact it for warm patches and says that it is usually evaluating the potential launch of patches for ISE variations 2.7 and three.0.

Virruso advised SecurityWeek that proof-of-concept (PoC) code concentrating on these vulnerabilities shall be revealed subsequent 12 months. In its advisory, Cisco warns that the PoC will doubtless change into obtainable after patches are launched.

Associated: Cisco Patches 33 Vulnerabilities in Enterprise Firewall Merchandise

Associated: Cisco Patches Excessive-Severity Bugs in Electronic mail, Id, Net Safety Merchandise

Associated: Citrix Patches Crucial Vulnerability in Gateway, ADC

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