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| author | Mark H Weaver <mhw@netris.org> | 2021-03-13 03:41:14 -0500 |
|---|---|---|
| committer | Mark H Weaver <mhw@netris.org> | 2021-03-13 04:58:12 -0500 |
| commit | 74e2c0e00f58c8bf948f7dc7c5ae2876af910d5a (patch) | |
| tree | dba40ada3e2ae08d37d0c76c8650288b378444c4 /gnu/packages/patches/gnutls-CVE-2021-20231.patch | |
| parent | ca8fa11754563786ffbae8de8da21fe086e1f9d2 (diff) | |
| download | guix-74e2c0e00f58c8bf948f7dc7c5ae2876af910d5a.tar.gz | |
gnu: gnutls: Fix CVE-2021-20231 and CVE-2021-20232.
* gnu/packages/patches/gnutls-CVE-2021-20231.patch, gnu/packages/patches/gnutls-CVE-2021-20232.patch: New files. * gnu/local.mk (dist_patch_DATA): Add them. * gnu/packages/tls.scm (gnutls)[replacement]: New field. (gnutls/fixed): New variable. (guile2.2-gnutls): Use package/inherit.
Diffstat (limited to 'gnu/packages/patches/gnutls-CVE-2021-20231.patch')
| -rw-r--r-- | gnu/packages/patches/gnutls-CVE-2021-20231.patch | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/gnu/packages/patches/gnutls-CVE-2021-20231.patch b/gnu/packages/patches/gnutls-CVE-2021-20231.patch new file mode 100644 index 0000000000..5186522eee --- /dev/null +++ b/gnu/packages/patches/gnutls-CVE-2021-20231.patch @@ -0,0 +1,62 @@ +From 15beb4b193b2714d88107e7dffca781798684e7e Mon Sep 17 00:00:00 2001 +From: Daiki Ueno <ueno@gnu.org> +Date: Fri, 29 Jan 2021 14:06:05 +0100 +Subject: [PATCH 1/2] key_share: avoid use-after-free around realloc + +Signed-off-by: Daiki Ueno <ueno@gnu.org> +--- + lib/ext/key_share.c | 12 +++++------- + 1 file changed, 5 insertions(+), 7 deletions(-) + +diff --git a/lib/ext/key_share.c b/lib/ext/key_share.c +index ab8abf8fe..a8c4bb5cf 100644 +--- a/lib/ext/key_share.c ++++ b/lib/ext/key_share.c +@@ -664,14 +664,14 @@ key_share_send_params(gnutls_session_t session, + { + unsigned i; + int ret; +- unsigned char *lengthp; +- unsigned int cur_length; + unsigned int generated = 0; + const gnutls_group_entry_st *group; + const version_entry_st *ver; + + /* this extension is only being sent on client side */ + if (session->security_parameters.entity == GNUTLS_CLIENT) { ++ unsigned int length_pos; ++ + ver = _gnutls_version_max(session); + if (unlikely(ver == NULL || ver->key_shares == 0)) + return 0; +@@ -679,16 +679,13 @@ key_share_send_params(gnutls_session_t session, + if (!have_creds_for_tls13(session)) + return 0; + +- /* write the total length later */ +- lengthp = &extdata->data[extdata->length]; ++ length_pos = extdata->length; + + ret = + _gnutls_buffer_append_prefix(extdata, 16, 0); + if (ret < 0) + return gnutls_assert_val(ret); + +- cur_length = extdata->length; +- + if (session->internals.hsk_flags & HSK_HRR_RECEIVED) { /* we know the group */ + group = get_group(session); + if (unlikely(group == NULL)) +@@ -736,7 +733,8 @@ key_share_send_params(gnutls_session_t session, + } + + /* copy actual length */ +- _gnutls_write_uint16(extdata->length - cur_length, lengthp); ++ _gnutls_write_uint16(extdata->length - length_pos - 2, ++ &extdata->data[length_pos]); + + } else { /* server */ + ver = get_version(session); +-- +2.30.2 + |