Attachment 635073 Details for Bug 864566 – RHEL-5 backport of the upstream security fixes

[patch] RHEL-5 backport of the upstream security fixes

elinks-0.11.1-CVE-2012-4545.patch (text/plain), 2.90 KB, created by Kamil Dudka on 2012-10-29 15:54:03 UTC

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Creator: Kamil Dudka

Created: 2012-10-29 15:54:03 UTC

Size: 2.90 KB

patch

obsolete

>From ee6da76f464d0fb43056f3ff013461a95e7a7c38 Mon Sep 17 00:00:00 2001
>From: Kamil Dudka <kdudka@redhat.com>
>Date: Tue, 9 Oct 2012 13:01:56 +0200
>Subject: [PATCH 1/2] http_negotiate: do not delegate GSSAPI credentials
>
>CVE-2012-4545.  Reported by Marko Myllynen.
>
>Signed-off-by: Kamil Dudka <kdudka@redhat.com>
>---
> src/protocol/http/http_negotiate.c |    2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
>diff --git a/src/protocol/http/http_negotiate.c b/src/protocol/http/http_negotiate.c
>index a376c2e..fa88b28 100644
>--- a/src/protocol/http/http_negotiate.c
>+++ b/src/protocol/http/http_negotiate.c
>@@ -187,7 +187,7 @@ http_negotiate_create_context(struct negotiate *neg)
> 					    &neg->context,
> 					    neg->server_name,
> 					    GSS_C_NO_OID,
>-					    GSS_C_DELEG_FLAG,
>+					    0,
> 					    0,
> 					    GSS_C_NO_CHANNEL_BINDINGS,
> 					    &neg->input_token,
>-- 
>1.7.1
>
>
>From af5202f29f80aeb581152640afc020a3a562a134 Mon Sep 17 00:00:00 2001
>From: Kalle Olavi Niemitalo <kon@iki.fi>
>Date: Fri, 26 Oct 2012 15:20:32 +0300
>Subject: [PATCH 2/2] http_negotiate: Fix int* vs. size_t* type mismatch
>MIME-Version: 1.0
>Content-Type: text/plain; charset=UTF-8
>Content-Transfer-Encoding: 8bit
>
>http_negotiate_parse_data passed &token->length as the int *outlen
>parameter of base64_decode_bin, which stores an int at that location.
>However, gss_buffer_desc::length is size_t in all implementations that
>I checked: MIT Kerberos Version 5 Release 1.10, libgssglue 0.4, and
>GNU GSS 1.0.2.  This mismatch could cause the build to fail:
>
>.../src/protocol/http/http_negotiate.c: In function âhttp_negotiate_parse_dataâ:
>.../src/protocol/http/http_negotiate.c:173:2: error: passing argument 3 of âbase64_decode_binâ from incompatible pointer type [-Werror]
>In file included from .../src/protocol/http/http_negotiate.c:30:0:
>.../src/util/base64.h:8:16: note: expected âint *â but argument is of type âsize_t *â
>
>On 64-bit big-endian hosts, it might also cause the GSSAPI
>implementation to read too much data from memory and disclose it to
>some network server, or crash ELinks.
>
>Signed-off-by: Kamil Dudka <kdudka@redhat.com>
>---
> src/protocol/http/http_negotiate.c |    4 +++-
> 1 files changed, 3 insertions(+), 1 deletions(-)
>
>diff --git a/src/protocol/http/http_negotiate.c b/src/protocol/http/http_negotiate.c
>index fa88b28..f25656a 100644
>--- a/src/protocol/http/http_negotiate.c
>+++ b/src/protocol/http/http_negotiate.c
>@@ -144,6 +144,7 @@ http_negotiate_parse_data(unsigned char *data, int type,
> {
> 	int len = 0;
> 	unsigned char *end;
>+	int bytelen = 0;
> 
> 	if (data==NULL || *data=='\0')
> 		return 0;
>@@ -169,7 +170,8 @@ http_negotiate_parse_data(unsigned char *data, int type,
> 	if (!len)
> 		return 0;
> 	
>-	token->value = (void *) base64_decode_bin(data, len, &token->length);
>+	token->value = (void *) base64_decode_bin(data, len, &bytelen);
>+	token->length = bytelen; /* convert int to size_t */
> 	
> 	if (!token->value)
> 		return -1;
>-- 
>1.7.1
>

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ovasik: review+

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Attachments on bug 864566: 624175 | 632061 | 633270 | 635073 | 635074