znc: Fix for CVE-2013-2130

ZNC 1.0 allows remote authenticated users to cause a denial of service
(NULL pointer reference and crash) via a crafted request to the (1) editnetwork,
(2) editchan, (3) addchan, or (4) delchan page in modules/webadmin.cpp.
Per: http://cwe.mitre.org/data/definitions/476.html
CWE-476: NULL Pointer Dereference

Signed-off-by: Xufeng Zhang <xufeng.zhang@windriver.com>
Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

2 files changed, 61 insertions, 1 deletions

diff --git a/meta-networking/recipes-irc/znc/znc/0001-Fix-NULL-pointer-dereference-in-webadmin.patch b/meta-networking/recipes-irc/znc/znc/0001-Fix-NULL-pointer-dereference-in-webadmin.patch
new file mode 100644
index 000000000..68e441470
--- /dev/null
+++ b/meta-networking/recipes-irc/znc/znc/0001-Fix-NULL-pointer-dereference-in-webadmin.patch
@@ -0,0 +1,58 @@
+Subject: [PATCH] Fix NULL pointer dereference in webadmin.
+
+Upstream-Status: Backport
+
+commit 2bd410ee5570cea127233f1133ea22f25174eb28 upstream
+
+Triggerable by any non-admin, if webadmin is loaded.
+
+The only affected version is 1.0
+
+Thanks to ChauffeR (Simone Esposito) for reporting this.
+---
+ modules/webadmin.cpp | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/modules/webadmin.cpp b/modules/webadmin.cpp
+index b793c02..816f217 100644
+--- a/modules/webadmin.cpp
++++ b/modules/webadmin.cpp
+@@ -419,7 +419,7 @@ public:
+                        CIRCNetwork* pNetwork = SafeGetNetworkFromParam(WebSock);
+ 
+                        // Admin||Self Check
+-                       if (!spSession->IsAdmin() && (!spSession->GetUser() || spSession->GetUser() != pNetwork->GetUser())) {
++                       if (!spSession->IsAdmin() && (!spSession->GetUser() || !pNetwork || spSession->GetUser() != pNetwork->GetUser())) {
+                                return false;
+                        }
+ 
+@@ -448,7 +448,7 @@ public:
+                        CIRCNetwork* pNetwork = SafeGetNetworkFromParam(WebSock);
+ 
+                        // Admin||Self Check
+-                       if (!spSession->IsAdmin() && (!spSession->GetUser() || spSession->GetUser() != pNetwork->GetUser())) {
++                       if (!spSession->IsAdmin() && (!spSession->GetUser() || !pNetwork || spSession->GetUser() != pNetwork->GetUser())) {
+                                return false;
+                        }
+ 
+@@ -472,7 +472,7 @@ public:
+                        CIRCNetwork* pNetwork = SafeGetNetworkFromParam(WebSock);
+ 
+                        // Admin||Self Check
+-                       if (!spSession->IsAdmin() && (!spSession->GetUser() || spSession->GetUser() != pNetwork->GetUser())) {
++                       if (!spSession->IsAdmin() && (!spSession->GetUser() || !pNetwork || spSession->GetUser() != pNetwork->GetUser())) {
+                                return false;
+                        }
+ 
+@@ -486,7 +486,7 @@ public:
+                        CIRCNetwork* pNetwork = SafeGetNetworkFromParam(WebSock);
+ 
+                        // Admin||Self Check
+-                       if (!spSession->IsAdmin() && (!spSession->GetUser() || spSession->GetUser() != pNetwork->GetUser())) {
++                       if (!spSession->IsAdmin() && (!spSession->GetUser() || !pNetwork || spSession->GetUser() != pNetwork->GetUser())) {
+                                return false;
+                        }
+ 
+-- 
+1.8.5.2.233.g932f7e4
+
diff --git a/meta-networking/recipes-irc/znc/znc_git.bb b/meta-networking/recipes-irc/znc/znc_git.bb
index c8a19dc56..77db25b33 100644
--- a/meta-networking/recipes-irc/znc/znc_git.bb
+++ b/meta-networking/recipes-irc/znc/znc_git.bb
@@ -7,7 +7,9 @@ DEPENDS = "openssl"
 PV = "1.0+git"
 
 SRCREV = "ef59c23068547c132cb678092fba9a21317fd5f2"
-SRC_URI = "git://github.com/znc/znc.git"
+SRC_URI = "git://github.com/znc/znc.git \
+           file://0001-Fix-NULL-pointer-dereference-in-webadmin.patch \
+          "
 
 S = "${WORKDIR}/git"