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| author | pjd <pjd@FreeBSD.org> | 2013-07-03 22:19:43 +0000 |
|---|---|---|
| committer | pjd <pjd@FreeBSD.org> | 2013-07-03 22:19:43 +0000 |
| commit | 745563514be1c4a53986276e837d351f916f2788 (patch) | |
| tree | 6c65d2cd9ed36c774bd6004d1ae854d1ca7f0528 /sbin/dhclient | |
| parent | 157b58cb300b2659ec65eee45aef27bfdcda91b6 (diff) | |
| download | FreeBSD-src-745563514be1c4a53986276e837d351f916f2788.zip FreeBSD-src-745563514be1c4a53986276e837d351f916f2788.tar.gz | |
MFp4 @229485:
Only allow to overwrite lease file.
Reviewed by: brooks
Sponsored by: The FreeBSD Foundation
Diffstat (limited to 'sbin/dhclient')
| -rw-r--r-- | sbin/dhclient/dhclient.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sbin/dhclient/dhclient.c b/sbin/dhclient/dhclient.c index 34ff853..ead20b4 100644 --- a/sbin/dhclient/dhclient.c +++ b/sbin/dhclient/dhclient.c @@ -1842,6 +1842,11 @@ rewrite_client_leases(void) leaseFile = fopen(path_dhclient_db, "w"); if (!leaseFile) error("can't create %s: %m", path_dhclient_db); + if (cap_rights_limit(fileno(leaseFile), CAP_FSTAT | CAP_FSYNC | + CAP_FTRUNCATE | CAP_SEEK | CAP_WRITE) < 0 && + errno != ENOSYS) { + error("can't limit lease descriptor: %m"); + } } else { fflush(leaseFile); rewind(leaseFile); |
