Re: [PATCH] osxkeychain: restrict queries to requests with a valid host

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Carlo Marcelo Arenas Belón  <carenas@xxxxxxxxx> writes:

> make sure that requests to this helper to get credentials return early if
> there is no host ord the host is empty.
>
> Signed-off-by: Carlo Marcelo Arenas Belón <carenas@xxxxxxxxx>
> ---
>  contrib/credential/osxkeychain/git-credential-osxkeychain.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/contrib/credential/osxkeychain/git-credential-osxkeychain.c b/contrib/credential/osxkeychain/git-credential-osxkeychain.c
> index bcd3f575a3..2264a88c41 100644
> --- a/contrib/credential/osxkeychain/git-credential-osxkeychain.c
> +++ b/contrib/credential/osxkeychain/git-credential-osxkeychain.c
> @@ -69,6 +69,12 @@ static void find_internet_password(void)
>  	UInt32 len;
>  	SecKeychainItemRef item;
>  
> +	/*
> +	 * Require at valid host to fix CVE-2020-11008
> +	 */

Just to clarify, you do not need this patch to "fix" it, as long as
you are running up-to-date Git, right?  In other words, this is more
like a belt-and-suspender protection, isn't it?

> +	if (!host || !*host)
> +		return;
> +
>  	if (SecKeychainFindInternetPassword(KEYCHAIN_ARGS, &len, &buf, &item))
>  		return;




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