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  • FortiOS & FortiProxy - Heap buffer overflow in sslvpn pre-authentication


    SeedTheNet

    FortiOS & FortiProxy - Heap buffer overflow in sslvpn pre-authentication

    Summary

    A heap-based buffer overflow vulnerability [CWE-122] in FortiOS and FortiProxy SSL-VPN may allow a remote attacker to execute arbitrary code or commands via specifically crafted requests.
     

    Workaround:

    Disable SSL-VPN.

    Affected Products

    At least
    FortiOS-6K7K version 7.0.10
    FortiOS-6K7K version 7.0.5
    FortiOS-6K7K version 6.4.12
    FortiOS-6K7K version 6.4.10
    FortiOS-6K7K version 6.4.8
    FortiOS-6K7K version 6.4.6
    FortiOS-6K7K version 6.4.2
    FortiOS-6K7K version 6.2.9 through 6.2.13
    FortiOS-6K7K version 6.2.6 through 6.2.7
    FortiOS-6K7K version 6.2.4
    FortiOS-6K7K version 6.0.12 through 6.0.16
    FortiOS-6K7K version 6.0.10
    At least
    FortiProxy version 7.2.0 through 7.2.3
    FortiProxy version 7.0.0 through 7.0.9
    FortiProxy version 2.0.0 through 2.0.12
    FortiProxy 1.2 all versions
    FortiProxy 1.1 all versions
    At least
    FortiOS version 7.2.0 through 7.2.4
    FortiOS version 7.0.0 through 7.0.11
    FortiOS version 6.4.0 through 6.4.12
    FortiOS version 6.2.0 through 6.2.13
    FortiOS version 6.0.0 through 6.0.16

    Solutions

    Please upgrade to FortiOS-6K7K version 7.0.12 or above
    Please upgrade to FortiOS-6K7K version 6.4.13 or above
    Please upgrade to FortiOS-6K7K version 6.2.15 or above
    Please upgrade to FortiOS-6K7K version 6.0.17 or above
    Please upgrade to FortiProxy version 7.2.4 or above
    Please upgrade to FortiProxy version 7.0.10 or above
    Please upgrade to FortiOS version 7.4.0 or above
    Please upgrade to FortiOS version 7.2.5 or above
    Please upgrade to FortiOS version 7.0.12 or above
    Please upgrade to FortiOS version 6.4.13 or above
    Please upgrade to FortiOS version 6.2.14 or above
    Please upgrade to FortiOS version 6.0.17 or above

    Acknowledgement

    Fortinet is pleased to thank Charles Fol and Dany Bach from LEXFO for bringing this issue to our attention under responsible disclosure.

    Timeline

    2023-06-12: Initial publication

    https://www.fortiguard.com/psirt/FG-IR-23-097


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