From 09e695246d30ef9b73e743e0130e710e19793d14 Mon Sep 17 00:00:00 2001 From: De Huo Date: Tue, 4 Feb 2020 07:06:02 -0800 Subject: bash: Fix CVE-2019-18276 An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11. By default, if Bash is run with its effective UID not equal to its real UID, it will drop privileges by setting its effective UID to its real UID. However, it does so incorrectly. On Linux and other systems that support "saved UID" functionality, the saved UID is not dropped. An attacker with command execution in the shell can use "enable -f" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges. However, binaries running with an effective UID of 0 are unaffected. Backport the CVE patche from https://github.com/bminor/bash/commit/ 951bdaad7a18cc0dc1036bba86b18b90874d39ff to fix CVE-2019-18276 (From OE-Core rev: b348e31c93f08332667df65cd2ecec63631d184e) Signed-off-by: Chet Ramey Signed-off-by: De Huo Signed-off-by: Armin Kuster Signed-off-by: Richard Purdie --- meta/recipes-extended/bash/bash_5.0.bb | 1 + 1 file changed, 1 insertion(+) (limited to 'meta/recipes-extended/bash/bash_5.0.bb') diff --git a/meta/recipes-extended/bash/bash_5.0.bb b/meta/recipes-extended/bash/bash_5.0.bb index eadc82279d..1b7058746f 100644 --- a/meta/recipes-extended/bash/bash_5.0.bb +++ b/meta/recipes-extended/bash/bash_5.0.bb @@ -19,6 +19,7 @@ SRC_URI = "${GNU_MIRROR}/bash/${BP}.tar.gz;name=tarball \ file://run-ptest \ file://run-bash-ptests \ file://fix-run-builtins.patch \ + file://bash-CVE-2019-18276.patch \ " SRC_URI[tarball.md5sum] = "2b44b47b905be16f45709648f671820b" -- cgit v1.2.3-54-g00ecf