Cisco pushes patches for its Home windows VPN purchasers
on 10/27/2022, by Michael Cooney, IDG NS (tailored by Jean Elyan), Safety, 627 phrases
Software program updates can be found for 2 Cisco AnyConnect VPN merchandise for Home windows. In keeping with the provider, the vulnerabilities affecting these merchandise symbolize a excessive risk.
Cisco is providing software program updates for 2 of its AnyConnect for Home windows merchandise that it says are actively exploited. AnyConnect for Home windows safety software program establishes VPN connectivity, supplies entry management, and helps different endpoint security measures. As said by Cisco, AnyConnect merchandise for MacOS and Linux usually are not affected. The seller has said that its Product Safety Incident Response Workforce (PSIRT) is conscious that proof-of-concept exploit code is out there for the vulnerability described on this advisory. In October 2022, Cisco PSIRT turned conscious of additional makes an attempt to take advantage of this vulnerability within the wild. Cisco nonetheless strongly recommends that prospects improve to a patched software program launch to handle this vulnerability, the seller stated in its advisory for each vulnerabilities. There isn’t any workaround, however software program updates can be found to repair it, the OEM stated.
The primary vulnerability pertains to a weak spot within the interprocess communication (IPC) channel of the Cisco AnyConnect Safe Mobility Shopper for Home windows. This might permit an authenticated native attacker to carry out a Microsoft Dynamic Hyperlink Library (DLL) hijacking assault. To take advantage of this vulnerability, the attacker would wish to have legitimate credentials on the Home windows system, the seller stated. The vulnerability outcomes from inadequate validation of the sources loaded by the appliance at runtime. An attacker might exploit this vulnerability by sending a modified IPC message to the AnyConnect course of, Cisco defined. Profitable exploitation might permit the attacker to execute arbitrary code on the affected machine with SYSTEM privileges. Cisco has addressed this vulnerability in AnyConnect Safe Mobility Shopper for Home windows variations 4.9.00086 and later.
Meraki affect tools
The second vulnerability considerations the set up part of AnyConnect Safe Mobility Shopper for Home windows. It might permit an authenticated native attacker to repeat user-provided recordsdata into system-level directories with elevated privileges. The vulnerability is a results of improper administration of listing paths, the seller stated. An attacker might exploit this vulnerability by making a malicious file and copying the file to a system listing. This might embrace DLL preloading, DLL hijacking, and different associated assaults. To take advantage of this vulnerability, the attacker should have legitimate credentials on the Home windows system, Cisco additionally stated. AnyConnect Safe Mobility Shopper for Home windows variations 4.8.02042 and later tackle the vulnerability.
Along with this Home windows weak spot, Cisco has lately patched a vulnerability within the AnyConnect VPN server of Meraki MX and Meraki Z3 Teleworker Gateway gadgets. This vulnerability, which has not been noticed to be exploited within the wild, outcomes from inadequate validation of customer-provided parameters when establishing an SSL VPN session, Cisco stated. An attacker might exploit this vulnerability by making a malicious request and sending it to the affected machine, the San Jos agency added. A profitable exploit might permit the attacker to crash and restart the Cisco AnyConnect VPN server, inflicting established SSL VPN connections to fail and forcing distant customers to provoke a brand new VPN connection and reauthenticate. A sustained assault might stop new SSL VPN connections from being established, Cisco stated. When assault visitors stops, the Cisco AnyConnect VPN server recovers gracefully with out the necessity for handbook intervention, the seller notes.
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