Cisco IP Phones Information Disclosure Vulnerability

Vulnerability

The vulnerability resides in the information storage architecture of multiple Cisco IP Phone models, where confidential information is stored unencrypted on flash memory. Affected models include IP Conference Phone 7832 and 8832, IP Phones 7811, 7821, 7841, 7861, 8811, 8841, 8845, 8851, 8861, 8865, Unified IP Conference Phone 8831, Unified IP Phones 7945G, 7965G, and 7975G, Unified SIP Phone 3905, and Wireless IP Phones 8821 and 8821-EX running vulnerable firmware releases [1].

Exploitation

An unauthenticated attacker with physical access to the affected device can exploit this vulnerability by extracting and reading the flash memory chips. No user interaction or special privileges are required. The attacker simply needs to physically remove the flash chips and access the stored data using standard memory read techniques [1].

Impact

Successful exploitation results in the disclosure of confidential information stored on the device, such as credentials or configuration data. This information can then be leveraged for subsequent attacks against the network or other systems [1].

Mitigation

Cisco has released firmware updates to address this vulnerability. Affected users should consult the Cisco Security Advisory for specific fixed versions and upgrade instructions. No workarounds are available. The vulnerability is not currently listed in the Known Exploited Vulnerabilities catalog [1].