linux-kernel - [PATCH V2 2/2] audit: log failed attempts to change audit

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <adac7ef36d2be8706e1f1ab0818205e495e0b4f2.1450268948.git.rgb@redhat.com>
Date:	Wed, 16 Dec 2015 10:42:33 -0500
From:	Richard Guy Briggs <rgb@...hat.com>
To:	linux-audit@...hat.com, linux-kernel@...r.kernel.org
Cc:	Richard Guy Briggs <rgb@...hat.com>, sgrubb@...hat.com,
	pmoore@...hat.com, eparis@...hat.com, v.rathor@...il.com,
	ctcard@...mail.com
Subject: [PATCH V2 2/2] audit: log failed attempts to change audit_pid configuration

Failed attempts to change the audit_pid configuration are not presently
logged.  One case is an attempt to starve an old auditd by starting up a
new auditd when the old one is still alive and active.  The other case
is an attempt to orphan a new auditd when an old auditd shuts down.

Log both as AUDIT_CONFIG_CHANGE messages with failure result.

Signed-off-by: Richard Guy Briggs <rgb@...hat.com>
---
 kernel/audit.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/kernel/audit.c b/kernel/audit.c
index 0368be2..9000c6f 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -882,11 +882,15 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 			int new_pid = s.pid;
 			pid_t requesting_pid = task_tgid_vnr(current);
 
-			if ((!new_pid) && (requesting_pid != audit_pid))
+			if ((!new_pid) && (requesting_pid != audit_pid)) {
+				audit_log_config_change("audit_pid", new_pid, audit_pid, 0);
 				return -EACCES;
+			}
 			if (audit_pid && new_pid &&
-			    audit_replace(requesting_pid) != -ECONNREFUSED)
+			    audit_replace(requesting_pid) != -ECONNREFUSED) {
+				audit_log_config_change("audit_pid", new_pid, audit_pid, 0);
 				return -EEXIST;
+			}
 			if (audit_enabled != AUDIT_OFF)
 				audit_log_config_change("audit_pid", new_pid, audit_pid, 1);
 			audit_pid = new_pid;
-- 
1.7.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/