Re: [PATCH] libxml2 CVE-2012-2871

[Saul Wold <sgw@linux.intel.com>]

Li,

All your recent CVE patches are missing Upsteam-Status: Backport in the 
patch header, please add that and send V2's!

Thanks
	Sau!


On 12/12/2012 09:54 PM, Li Wang wrote:
> the patch come from:
> http://src.chromium.org/viewvc/chrome/trunk/src/third_party/libxml/src \
> /include/libxml/tree.h?r1=56276&r2=149930
>
> libxml2 2.9.0-rc1 and earlier, as used in Google Chrome before 21.0.1180.89,
> does not properly support a cast of an unspecified variable during handling
> of XSL transforms, which allows remote attackers to cause a denial of service
> or possibly have unknown other impact via a crafted document, related to the
> _xmlNs data structure in include/libxml/tree.h.
>
> http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-2871
>
> [YOCTO #3580]
> [ CQID: WIND00376779 ]
> Upstream-Status: Pending
>
> Signed-off-by: Li Wang <li.wang@windriver.com>
> ---
>   .../libxml/libxml2/libxml2-CVE-2012-2871.patch     | 34 ++++++++++++++++++++++
>   meta/recipes-core/libxml/libxml2_2.9.0.bb          |  5 +++-
>   2 files changed, 38 insertions(+), 1 deletion(-)
>   create mode 100644 meta/recipes-core/libxml/libxml2/libxml2-CVE-2012-2871.patch
>
> diff --git a/meta/recipes-core/libxml/libxml2/libxml2-CVE-2012-2871.patch b/meta/recipes-core/libxml/libxml2/libxml2-CVE-2012-2871.patch
> new file mode 100644
> index 0000000..3c66a9c
> --- /dev/null
> +++ b/meta/recipes-core/libxml/libxml2/libxml2-CVE-2012-2871.patch
> @@ -0,0 +1,34 @@
> +libxml2 CVE-2012-2871
> +
> +the patch come from:
> +http://src.chromium.org/viewvc/chrome/trunk/src/third_party/libxml/src \
> +/include/libxml/tree.h?r1=56276&r2=149930
> +
> +libxml2 2.9.0-rc1 and earlier, as used in Google Chrome before 21.0.1180.89,
> +does not properly support a cast of an unspecified variable during handling
> +of XSL transforms, which allows remote attackers to cause a denial of service
> +or possibly have unknown other impact via a crafted document, related to the
> +_xmlNs data structure in include/libxml/tree.h.
> +
> +http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-2871
> +
> +Signed-off-by: Li Wang <li.wang@windriver.com>
> +---
> + include/libxml/tree.h |    1 +
> + 1 files changed, 1 insertions(+), 0 deletions(-)
> +
> +diff --git a/include/libxml/tree.h b/include/libxml/tree.h
> +index b733589..5422dda 100644
> +--- a/include/libxml/tree.h
> ++++ b/include/libxml/tree.h
> +@@ -351,6 +351,7 @@ struct _xmlNs {
> +     struct _xmlNs  *next;	/* next Ns link for this node  */
> +     xmlNsType      type;	/* global or local */
> +     const xmlChar *href;	/* URL for the namespace */
> ++    const char *dummy_children;	/* lines up with node->children */
> +     const xmlChar *prefix;	/* prefix for the namespace */
> +     void           *_private;   /* application data */
> +     struct _xmlDoc *context;		/* normally an xmlDoc */
> +--
> +1.7.0.5
> +
> diff --git a/meta/recipes-core/libxml/libxml2_2.9.0.bb b/meta/recipes-core/libxml/libxml2_2.9.0.bb
> index a022ae9..ecc19fb 100644
> --- a/meta/recipes-core/libxml/libxml2_2.9.0.bb
> +++ b/meta/recipes-core/libxml/libxml2_2.9.0.bb
> @@ -1,6 +1,9 @@
>   require libxml2.inc
>
> -PR = "${INC_PR}.0"
> +PR = "${INC_PR}.1"
>
>   SRC_URI[md5sum] = "5b9bebf4f5d2200ae2c4efe8fa6103f7"
>   SRC_URI[sha256sum] = "ad25d91958b7212abdc12b9611cfb4dc4e5cddb6d1e9891532f48aacee422b82"
> +
> +SRC_URI += "file://libxml2-CVE-2012-2871.patch \
> +	   "
>