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From: Anthony G. Basile <blueness@gentoo.org>
Removed deprecated NIPQUAD macro in favor of %pI4.
See bug #346333.
---
From: Gordon Malm <gengor@gentoo.org>
This is a reworked version of the original
*_selinux-avc_audit-log-curr_ip.patch carried in earlier releases of
hardened-sources.
Dropping the patch, or simply fixing the #ifdef of the original patch
could break automated logging setups so this route was necessary.
Suggestions for improving the help text are welcome.
The original patch's description is still accurate and included below.
---
Provides support for a new field ipaddr within the SELinux
AVC audit log, relying in task_struct->curr_ip (ipv4 only)
provided by grSecurity patch to be applied before.
Signed-off-by: Lorenzo Hernandez Garcia-Hierro <lorenzo@gnu.org>
---
diff -Naur a/grsecurity/Kconfig b/grsecurity/Kconfig
--- a/grsecurity/Kconfig 2011-04-17 19:25:54.000000000 -0400
+++ b/grsecurity/Kconfig 2011-04-17 19:32:53.000000000 -0400
@@ -924,6 +924,27 @@
menu "Logging Options"
depends on GRKERNSEC
+config GRKERNSEC_SELINUX_AVC_LOG_IPADDR
+ def_bool n
+ prompt "Add source IP address to SELinux AVC log messages"
+ depends on GRKERNSEC && SECURITY_SELINUX
+ help
+ If you say Y here, a new field "ipaddr=" will be added to many SELinux
+ AVC log messages. The value of this field in any given message
+ represents the source IP address of the remote machine/user that created
+ the offending process.
+
+ This information is sourced from task_struct->curr_ip provided by
+ grsecurity's GRKERNSEC top-level configuration option. One limitation
+ is that only IPv4 is supported.
+
+ In many instances SELinux AVC log messages already log a superior level
+ of information that also includes source port and destination ip/port.
+ Additionally, SELinux's AVC log code supports IPv6.
+
+ However, grsecurity's task_struct->curr_ip will sometimes (often?)
+ provide the offender's IP address where stock SELinux logging fails to.
+
config GRKERNSEC_FLOODTIME
int "Seconds in between log messages (minimum)"
default 10
diff -Naur a/security/selinux/avc.c b/security/selinux/avc.c
--- a/security/selinux/avc.c 2011-04-17 19:04:47.000000000 -0400
+++ b/security/selinux/avc.c 2011-04-17 19:32:53.000000000 -0400
@@ -133,6 +133,11 @@
char *scontext;
u32 scontext_len;
+#ifdef CONFIG_GRKERNSEC_SELINUX_AVC_LOG_IPADDR
+ if (current->signal->curr_ip)
+ audit_log_format(ab, "ipaddr=%pI4 ", ¤t->signal->curr_ip);
+#endif
+
rc = security_sid_to_context(ssid, &scontext, &scontext_len);
if (rc)
audit_log_format(ab, "ssid=%d", ssid);
|
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