Executive Summary

[{'type': 'paragraph', 'content': "CVE-2026-27520 affects the Binardat 10G08-0800GSM network switch firmware versions prior to V300SP10260209. The vulnerability involves storing a user password in a client-side cookie as a Base64-encoded value accessible through the device's web interface."}, {'type': 'paragraph', 'content': 'Since Base64 encoding is reversible and does not provide any confidentiality, an attacker who can access this cookie can easily decode it to retrieve the plaintext password.'}, {'type': 'paragraph', 'content': 'This issue is classified under CWE-312 (Cleartext Storage of Sensitive Information) and allows remote attackers to obtain sensitive credentials without any privileges or user interaction.'}] [1]

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Impact Analysis

An attacker who can access the Base64-encoded cookie can decode it to recover the plaintext user password.

This allows remote attackers to obtain sensitive credentials without needing any privileges or user interaction, posing a significant security risk.

With the recovered password, an attacker could potentially gain unauthorized access to the network switch, leading to further compromise of the network infrastructure.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': "This vulnerability can be detected by inspecting the cookies set by the Binardat 10G08-0800GSM network switch's web interface for the presence of Base64-encoded user passwords."}, {'type': 'paragraph', 'content': 'You can use network traffic capture tools such as Wireshark or tcpdump to capture HTTP traffic between your browser and the switch, then look for cookies containing Base64-encoded strings.'}, {'type': 'paragraph', 'content': "Alternatively, you can use browser developer tools to inspect cookies set by the switch's web interface."}, {'type': 'paragraph', 'content': 'For command-line detection, you might use commands like:'}, {'type': 'list_item', 'content': "tcpdump -i <interface> -A -s 0 'tcp port 80 or tcp port 443' | grep 'Cookie'"}, {'type': 'list_item', 'content': 'curl -I http://<switch-ip> # to inspect headers including cookies'}, {'type': 'list_item', 'content': "echo '<Base64-encoded-cookie-value>' | base64 --decode # to decode the Base64 string and check if it reveals a password"}] [1]

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Mitigation Strategies

[{'type': 'paragraph', 'content': 'The immediate mitigation step is to upgrade the Binardat 10G08-0800GSM network switch firmware to version V300SP10260209 or later, where this vulnerability is fixed.'}, {'type': 'paragraph', 'content': "Until the firmware is updated, restrict access to the switch's web interface to trusted networks or users to reduce the risk of an attacker accessing the Base64-encoded password cookie."}, {'type': 'paragraph', 'content': 'Additionally, monitor network traffic for suspicious access attempts and consider changing user passwords after the firmware upgrade.'}] [1]

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