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Add a seccomp filter to prevent creating setuid/setgid binaries

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This prevents builders from setting the S_ISUID or S_ISGID bits,
preventing users from using a nixbld* user to create a setuid/setgid
binary to interfere with subsequent builds under the same nixbld* uid.

This is based on aszlig's seccomp code
(47f587700d).

Reported by Linus Heckemann.
This commit is contained in:
Eelco Dolstra 2017-05-29 11:34:24 +02:00
parent 6e01ecd112
commit 6cc6c15a2d
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GPG key ID: 8170B4726D7198DE
5 changed files with 54 additions and 1 deletions
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7
configure.ac
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@ -176,6 +176,13 @@ AC_SUBST(HAVE_SODIUM, [$have_sodium])
PKG_CHECK_MODULES([LIBLZMA], [liblzma], [CXXFLAGS="$LIBLZMA_CFLAGS $CXXFLAGS"])
# Look for libseccomp, required for Linux sandboxing.
if test "$sys_name" = linux; then
PKG_CHECK_MODULES([LIBSECCOMP], [libseccomp],
[CXXFLAGS="$LIBSECCOMP_CFLAGS $CXXFLAGS"])
fi
# Look for aws-cpp-sdk-s3.
AC_LANG_PUSH(C++)
AC_CHECK_HEADERS([aws/s3/S3Client.h],