glibc: Document and whitelist CVE-2021-35942

This CVE is fixed in the upstream glibc-2.31 branch, and dunfell already
includes an update to this version in commit e1e89ff7d75c3d22 ("glibc:
update to lastest 2.31 release HEAD")

(From OE-Core rev: c1d49cee0a3a7391708b19647889f48036d7e4e8)

Signed-off-by: Ralph Siemsen <ralph.siemsen@linaro.org>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/meta/recipes-core/glibc/glibc_2.31.bb b/meta/recipes-core/glibc/glibc_2.31.bb
index 23242fff76..8742efc36f 100644
--- a/meta/recipes-core/glibc/glibc_2.31.bb
+++ b/meta/recipes-core/glibc/glibc_2.31.bb
@@ -18,6 +18,16 @@ CVE_CHECK_WHITELIST += "CVE-2019-1010022 CVE-2019-1010023 CVE-2019-1010024"
 # Potential patch at https://sourceware.org/bugzilla/show_bug.cgi?id=22853
 CVE_CHECK_WHITELIST += "CVE-2019-1010025"
 
+# glibc https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-35942
+# The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash
+# or read arbitrary memory in parse_param (in posix/wordexp.c) when called with
+# an untrusted, crafted pattern, potentially resulting in a denial of service
+# or disclosure of information. Patch was backported to 2.31 branch already:
+# https://sourceware.org/git/?p=glibc.git;a=commit;h=4f0a61f75385c9a5879cbe7202042e88f692a3c8
+# which is already included in the dunfell branch of poky:
+# https://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?h=dunfell&id=e1e89ff7d75c3d2223f9e3bd875b9b0c5e15836b
+CVE_CHECK_WHITELIST += "CVE-2021-35942"
+
 DEPENDS += "gperf-native bison-native make-native"
 
 NATIVESDKFIXES ?= ""