[Buildroot] [PATCH] package/libcurl: security bump to version 7.79.1

[Arnout Vandecappelle]

On 22/09/2021 10:53, Peter Korsgaard wrote:
> Fixes the following security issues:
> 
> - CVE-2021-22945: UAF and double-free in MQTT sending
>    When sending data to an MQTT server, libcurl could in some circumstances
>    erroneously keep a pointer to an already freed memory area and both use
>    that again in a subsequent call to send data and also free it again.
> 
>    https://curl.se/docs/CVE-2021-22945.html
> 
> - CVE-2021-22946: Protocol downgrade required TLS bypassed
>    A user can tell curl to require a successful upgrade to TLS when speaking
>    to an IMAP, POP3 or FTP server (--ssl-reqd on the command line or
>    CURLOPT_USE_SSL set to CURLUSESSL_CONTROL or CURLUSESSL_ALL with libcurl).
>    This requirement could be bypassed if the server would return a properly
>    crafted but perfectly legitimate response.
> 
>    This flaw would then make curl silently continue its operations without
>    TLS contrary to the instructions and expectations, exposing possibly
>    sensitive data in clear text over the network.
> 
>    https://curl.se/docs/CVE-2021-22946.html
> 
> - CVE-2021-22947: STARTTLS protocol injection via MITM
>    When curl connects to an IMAP, POP3, SMTP or FTP server to exchange data
>    securely using STARTTLS to upgrade the connection to TLS level, the server
>    can still respond and send back multiple responses before the TLS upgrade.
>    Such multiple "pipelined" responses are cached by curl.  curl would then
>    upgrade to TLS but not flush the in-queue of cached responses and instead
>    use and trust the responses it got before the TLS handshake as if they
>    were authenticated.
> 
>    Using this flaw, it allows a Man-In-The-Middle attacker to first inject
>    the fake responses, then pass-through the TLS traffic from the legitimate
>    server and trick curl into sending data back to the user thinking the
>    attacker's injected data comes from the TLS-protected server.
> 
>    Over POP3 and IMAP an attacker can inject fake response data.
> 
>    https://curl.se/docs/CVE-2021-22947.html
> 
> In addition, 7.79.1 fixes a number of regressions in 7.79.0:
> https://daniel.haxx.se/blog/2021/09/22/curl-7-79-1-patched-up-and-ready/
> 
> Signed-off-by: Peter Korsgaard <peter at korsgaard.com>

  Applied to master, thanks.

  Regards,
  Arnout

> ---
>   package/libcurl/libcurl.hash | 4 ++--
>   package/libcurl/libcurl.mk   | 2 +-
>   2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/package/libcurl/libcurl.hash b/package/libcurl/libcurl.hash
> index 5e5776d1e3..b13f01c874 100644
> --- a/package/libcurl/libcurl.hash
> +++ b/package/libcurl/libcurl.hash
> @@ -1,5 +1,5 @@
>   # Locally calculated after checking pgp signature
> -# https://curl.se/download/curl-7.78.0.tar.xz.asc
> +# https://curl.se/download/curl-7.79.1.tar.xz.asc
>   # signed with key 27EDEAF22F3ABCEB50DB9A125CC908FDB71E12C2
> -sha256  be42766d5664a739c3974ee3dfbbcbe978a4ccb1fe628bb1d9b59ac79e445fb5  curl-7.78.0.tar.xz
> +sha256  0606f74b1182ab732a17c11613cbbaf7084f2e6cca432642d0e3ad7c224c3689  curl-7.79.1.tar.xz
>   sha256  6fd1a1c008b5ef4c4741dd188c3f8af6944c14c25afa881eb064f98fb98358e7  COPYING
> diff --git a/package/libcurl/libcurl.mk b/package/libcurl/libcurl.mk
> index 4e3c6d4523..a70ebe4113 100644
> --- a/package/libcurl/libcurl.mk
> +++ b/package/libcurl/libcurl.mk
> @@ -4,7 +4,7 @@
>   #
>   ################################################################################
>   
> -LIBCURL_VERSION = 7.78.0
> +LIBCURL_VERSION = 7.79.1
>   LIBCURL_SOURCE = curl-$(LIBCURL_VERSION).tar.xz
>   LIBCURL_SITE = https://curl.se/download
>   LIBCURL_DEPENDENCIES = host-pkgconf \
>