From aeca4e2ca65c1aeacfbe520684e6421719d99417 Mon Sep 17 00:00:00 2001 From: Micah Morton Date: Wed, 16 Jan 2019 07:46:06 -0800 Subject: LSM: add SafeSetID module that gates setid calls SafeSetID gates the setid family of syscalls to restrict UID/GID transitions from a given UID/GID to only those approved by a system-wide whitelist. These restrictions also prohibit the given UIDs/GIDs from obtaining auxiliary privileges associated with CAP_SET{U/G}ID, such as allowing a user to set up user namespace UID mappings. For now, only gating the set*uid family of syscalls is supported, with support for set*gid coming in a future patch set. Signed-off-by: Micah Morton Acked-by: Kees Cook Signed-off-by: James Morris --- security/safesetid/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 security/safesetid/Kconfig (limited to 'security/safesetid/Kconfig') diff --git a/security/safesetid/Kconfig b/security/safesetid/Kconfig new file mode 100644 index 000000000000..bf89a47ffcc8 --- /dev/null +++ b/security/safesetid/Kconfig @@ -0,0 +1,12 @@ +config SECURITY_SAFESETID + bool "Gate setid transitions to limit CAP_SET{U/G}ID capabilities" + default n + help + SafeSetID is an LSM module that gates the setid family of syscalls to + restrict UID/GID transitions from a given UID/GID to only those + approved by a system-wide whitelist. These restrictions also prohibit + the given UIDs/GIDs from obtaining auxiliary privileges associated + with CAP_SET{U/G}ID, such as allowing a user to set up user namespace + UID mappings. + + If you are unsure how to answer this question, answer N. -- cgit v1.2.3