thodg/libgit2/src

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  • Hash : 66e3774d
    Author : Patrick Steinhardt
    Date : 2016-11-15T11:36:27 

    smart_pkt: verify packet length exceeds PKT_LEN_SIZE

Each packet line in the Git protocol is prefixed by a four-byte
length of how much data will follow, which we parse in
`git_pkt_parse_line`. The transmitted length can either be equal
to zero in case of a flush packet or has to be at least of length
four, as it also includes the encoded length itself. Not
checking this may result in a buffer overflow as we directly pass
the length to functions which accept a `size_t` length as
parameter.

Fix the issue by verifying that non-flush packets have at least a
length of `PKT_LEN_SIZE`.

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