44 lines
971 B
C
44 lines
971 B
C
--- src/fsio.c.orig 2020-07-21 17:25:51 UTC
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+++ src/fsio.c
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@@ -70,6 +70,10 @@ static size_t copy_iter_count = 0;
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# define NFS_SUPER_MAGIC 0x6969
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#endif
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+#if defined(__FreeBSD__)
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+#include <dlfcn.h>
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+#endif
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+
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typedef struct fsopendir fsopendir_t;
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struct fsopendir {
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@@ -1109,7 +1113,30 @@ static int sys_fsetxattr(pool *p, pr_fh_t *fh, int fd,
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return res;
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}
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+#if defined(__FreeBSD__)
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+static int
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+enter_freebsd_restricted_mode()
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+{
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+ typedef void frmode_t();
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+ frmode_t *frmode;
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+
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+ frmode = (frmode_t *)dlfunc(
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+ RTLD_NEXT, "__FreeBSD_libc_enter_restricted_mode");
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+ if (frmode == NULL) {
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+ pr_log_pri(PR_LOG_ERR,
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+ "error: FreeBSD with vulnerable chroot (FreeBSD-SA-11:07.chroot)");
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+ return 1;
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+ }
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+ frmode();
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+ return 0;
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+}
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+#endif
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+
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static int sys_chroot(pr_fs_t *fs, const char *path) {
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+#if defined(__FreeBSD__)
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+ if (enter_freebsd_restricted_mode() != 0)
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+ return -1;
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+#endif
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if (chroot(path) < 0) {
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return -1;
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}
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