xserver-xorg: whitelist two CVEs

CVE-2011-4613 is specific to Debian/Ubuntu.

CVE-2020-25697 is a non-trivial attack that may not actually be feasible
considering the default behaviour for clients is to exit if the
connection is lost.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg.inc b/meta/recipes-graphics/xorg-xserver/xserver-xorg.inc
index 4e88cf26f723ba4088530ca88939dcc3d7399746..437d5a886155dff16b6ca9523e215a865b0f4e8b 100644 (file)
--- a/meta/recipes-graphics/xorg-xserver/xserver-xorg.inc
+++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg.inc
@@ -20,6 +20,14 @@ SRC_URI = "${XORG_MIRROR}/individual/xserver/${XORG_PN}-${PV}.tar.xz"
 UPSTREAM_CHECK_REGEX = "xorg-server-(?P<pver>\d+(\.(?!99)\d+)+)\.tar"
 
 CVE_PRODUCT = "xorg-server x_server"
+# This is specific to Debian's xserver-wrapper.c
+CVE_CHECK_WHITELIST += "CVE-2011-4613"
+# As per upstream, exploiting this flaw is non-trivial and it requires exact
+# timing on the behalf of the attacker. Many graphical applications exit if their
+# connection to the X server is lost, so a typical desktop session is either
+# impossible or difficult to exploit. There is currently no upstream patch
+# available for this flaw.
+CVE_CHECK_WHITELIST += "CVE-2020-25697"
 
 S = "${WORKDIR}/${XORG_PN}-${PV}"