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nss-pam-ldapd commit: r1772 - in nss-pam-ldapd-0.7.15+squeeze: . nslcd

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nss-pam-ldapd commit: r1772 - in nss-pam-ldapd-0.7.15+squeeze: . nslcd



Author: arthur
Date: Thu Sep 20 20:34:03 2012
New Revision: 1772
URL: http://arthurdejong.org/viewvc/nss-pam-ldapd?revision=1772&view=revision

Log:
implements proper range checking numeric values returned from LDAP (thanks 
Jakub Hrozek) (r1523, r1524 and r1528 from 0.8, r1600 from 0.7)

Modified:
   nss-pam-ldapd-0.7.15+squeeze/   (props changed)
   nss-pam-ldapd-0.7.15+squeeze/AUTHORS
   nss-pam-ldapd-0.7.15+squeeze/configure.ac
   nss-pam-ldapd-0.7.15+squeeze/nslcd/cfg.c
   nss-pam-ldapd-0.7.15+squeeze/nslcd/common.c
   nss-pam-ldapd-0.7.15+squeeze/nslcd/common.h
   nss-pam-ldapd-0.7.15+squeeze/nslcd/group.c
   nss-pam-ldapd-0.7.15+squeeze/nslcd/passwd.c
   nss-pam-ldapd-0.7.15+squeeze/nslcd/protocol.c
   nss-pam-ldapd-0.7.15+squeeze/nslcd/rpc.c
   nss-pam-ldapd-0.7.15+squeeze/nslcd/service.c
   nss-pam-ldapd-0.7.15+squeeze/nslcd/shadow.c

Modified: nss-pam-ldapd-0.7.15+squeeze/AUTHORS
==============================================================================
--- nss-pam-ldapd-0.7.15+squeeze/AUTHORS        Sun Sep 16 17:57:02 2012        
(r1771)
+++ nss-pam-ldapd-0.7.15+squeeze/AUTHORS        Thu Sep 20 20:34:03 2012        
(r1772)
@@ -79,3 +79,4 @@
 Jan Schampera <jan.schampera@web.de>
 Nalin Dahyabhai <nalin@redhat.com>
 Daniel Dehennin <daniel.dehennin@baby-gnu.org>
+Jakub Hrozek <jhrozek@redhat.com>

Modified: nss-pam-ldapd-0.7.15+squeeze/configure.ac
==============================================================================
--- nss-pam-ldapd-0.7.15+squeeze/configure.ac   Sun Sep 16 17:57:02 2012        
(r1771)
+++ nss-pam-ldapd-0.7.15+squeeze/configure.ac   Thu Sep 20 20:34:03 2012        
(r1772)
@@ -222,7 +222,7 @@
 AC_CHECK_FUNCS([sigaction snprintf])
 AC_CHECK_FUNCS(gethostbyname)
 AC_SEARCH_LIBS(socket,socket)
-AC_CHECK_FUNCS([strcasecmp strncasecmp strchr strcspn strspn strtol])
+AC_CHECK_FUNCS([strcasecmp strncasecmp strchr strcspn strspn strtol strtoul 
strtoull])
 AC_CHECK_FUNCS([malloc realloc])
 AC_FUNC_FORK
 
@@ -235,6 +235,11 @@
 AC_TYPE_UINT8_T
 AC_TYPE_UINT16_T
 AC_TYPE_UINT32_T
+AC_CHECK_SIZEOF(unsigned int)
+AC_CHECK_SIZEOF(unsigned long int)
+AC_CHECK_SIZEOF(unsigned long long int)
+AC_CHECK_SIZEOF(uid_t)
+AC_CHECK_SIZEOF(gid_t)
 
 # check for support for the __thread keyword
 AC_CACHE_CHECK([whether $CC supports '__thread'], [mn_cv_c___thread_supported],

Modified: nss-pam-ldapd-0.7.15+squeeze/nslcd/cfg.c
==============================================================================
--- nss-pam-ldapd-0.7.15+squeeze/nslcd/cfg.c    Sun Sep 16 17:57:02 2012        
(r1771)
+++ nss-pam-ldapd-0.7.15+squeeze/nslcd/cfg.c    Thu Sep 20 20:34:03 2012        
(r1772)
@@ -442,8 +442,9 @@
   char *tmp;
   
check_argumentcount(filename,lnr,keyword,get_token(line,token,sizeof(token))!=NULL);
   /* check if it is a valid numerical uid */
-  *var=(uid_t)strtol(token,&tmp,0);
-  if ((*token!='\0')&&(*tmp=='\0'))
+  errno=0;
+  *var=strtouid(token,&tmp,0);
+  if ((*token!='\0')&&(*tmp=='\0')&&(errno==0))
     return;
   /* find by name */
   pwent=getpwnam(token);
@@ -467,8 +468,9 @@
   char *tmp;
   
check_argumentcount(filename,lnr,keyword,get_token(line,token,sizeof(token))!=NULL);
   /* check if it is a valid numerical gid */
-  *var=(gid_t)strtol(token,&tmp,0);
-  if ((*token!='\0')&&(*tmp=='\0'))
+  errno=0;
+  *var=strtogid(token,&tmp,0);
+  if ((*token!='\0')&&(*tmp=='\0')&&(errno==0))
     return;
   /* find by name */
   grent=getgrnam(token);

Modified: nss-pam-ldapd-0.7.15+squeeze/nslcd/common.c
==============================================================================
--- nss-pam-ldapd-0.7.15+squeeze/nslcd/common.c Sun Sep 16 17:57:02 2012        
(r1771)
+++ nss-pam-ldapd-0.7.15+squeeze/nslcd/common.c Thu Sep 20 20:34:03 2012        
(r1772)
@@ -3,7 +3,7 @@
    This file is part of the nss-pam-ldapd library.
 
    Copyright (C) 2006 West Consulting
-   Copyright (C) 2006, 2007, 2008, 2009 Arthur de Jong
+   Copyright (C) 2006, 2007, 2008, 2009, 2011 Arthur de Jong
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -176,3 +176,20 @@
   /* we're done */
   return 0;
 }
+
+#ifdef WANT_STRTOUI
+/* provide a strtoui() implementation, similar to strtoul() but returning
+   an range-checked unsigned int instead */
+unsigned int strtoui(const char *nptr,char **endptr,int base)
+{
+  unsigned long val;
+  val=strtoul(nptr,endptr,base);
+  if (val>UINT_MAX)
+  {
+    errno=ERANGE;
+    return UINT_MAX;
+  }
+  /* If errno was set by strtoull, we'll pass it back as-is */
+  return (unsigned int)val;
+}
+#endif /* WANT_STRTOUI */

Modified: nss-pam-ldapd-0.7.15+squeeze/nslcd/common.h
==============================================================================
--- nss-pam-ldapd-0.7.15+squeeze/nslcd/common.h Sun Sep 16 17:57:02 2012        
(r1771)
+++ nss-pam-ldapd-0.7.15+squeeze/nslcd/common.h Thu Sep 20 20:34:03 2012        
(r1772)
@@ -3,7 +3,7 @@
    This file is part of the nss-pam-ldapd library.
 
    Copyright (C) 2006 West Consulting
-   Copyright (C) 2006, 2007, 2008, 2009, 2010 Arthur de Jong
+   Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Arthur de Jong
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -94,6 +94,37 @@
 /* transforms the uid into a DN by doing an LDAP lookup */
 MUST_USE char *uid2dn(MYLDAP_SESSION *session,const char *uid,char *buf,size_t 
buflen);
 
+/* provide strtouid() function alias */
+#if SIZEOF_UID_T == SIZEOF_UNSIGNED_LONG_INT
+#define strtouid (uid_t)strtoul
+#elif SIZEOF_UID_T == SIZEOF_UNSIGNED_LONG_LONG_INT
+#define strtouid (uid_t)strtoull
+#elif SIZEOF_UID_T == SIZEOF_UNSIGNED_INT
+#define WANT_STRTOUI 1
+#define strtouid (uid_t)strtoui
+#else
+#error unable to find implementation for strtouid()
+#endif
+
+/* provide strtouid() function alias */
+#if SIZEOF_GID_T == SIZEOF_UNSIGNED_LONG_INT
+#define strtogid (gid_t)strtoul
+#elif SIZEOF_GID_T == SIZEOF_UNSIGNED_LONG_LONG_INT
+#define strtogid (gid_t)strtoull
+#elif SIZEOF_GID_T == SIZEOF_UNSIGNED_INT
+#ifndef WANT_STRTOUI
+#define WANT_STRTOUI 1
+#endif
+#define strtogid (uid_t)strtoui
+#else
+#error unable to find implementation for strtogid()
+#endif
+
+#ifdef WANT_STRTOUI
+/* provide a strtoui() if it is needed */
+unsigned int strtoui(const char *nptr,char **endptr,int base);
+#endif /* WANT_STRTOUI */
+
 /* these are the functions for initialising the database specific
    modules */
 void alias_init(void);

Modified: nss-pam-ldapd-0.7.15+squeeze/nslcd/group.c
==============================================================================
--- nss-pam-ldapd-0.7.15+squeeze/nslcd/group.c  Sun Sep 16 17:57:02 2012        
(r1771)
+++ nss-pam-ldapd-0.7.15+squeeze/nslcd/group.c  Thu Sep 20 20:34:03 2012        
(r1772)
@@ -251,13 +251,20 @@
     }
     for 
(numgids=0;(gidvalues[numgids]!=NULL)&&(numgids<MAXGIDS_PER_ENTRY);numgids++)
     {
-      gids[numgids]=(gid_t)strtol(gidvalues[numgids],&tmp,0);
+      errno=0;
+      gids[numgids]=strtogid(gidvalues[numgids],&tmp,0);
       if ((*(gidvalues[numgids])=='\0')||(*tmp!='\0'))
       {
         log_log(LOG_WARNING,"group entry %s contains non-numeric %s value",
                             myldap_get_dn(entry),attmap_group_gidNumber);
         return 0;
       }
+      else if (errno!=0)
+      {
+        log_log(LOG_WARNING,"group entry %s contains too large %s value",
+                            myldap_get_dn(entry),attmap_group_gidNumber);
+        return 0;
+      }
     }
   }
   /* get group passwd (userPassword) (use only first entry) */

Modified: nss-pam-ldapd-0.7.15+squeeze/nslcd/passwd.c
==============================================================================
--- nss-pam-ldapd-0.7.15+squeeze/nslcd/passwd.c Sun Sep 16 17:57:02 2012        
(r1771)
+++ nss-pam-ldapd-0.7.15+squeeze/nslcd/passwd.c Thu Sep 20 20:34:03 2012        
(r1772)
@@ -338,13 +338,20 @@
     }
     for 
(numuids=0;(numuids<MAXUIDS_PER_ENTRY)&&(tmpvalues[numuids]!=NULL);numuids++)
     {
-      uids[numuids]=(uid_t)strtol(tmpvalues[numuids],&tmp,0);
+      errno=0;
+      uids[numuids]=strtouid(tmpvalues[numuids],&tmp,0);
       if ((*(tmpvalues[numuids])=='\0')||(*tmp!='\0'))
       {
         log_log(LOG_WARNING,"passwd entry %s contains non-numeric %s value",
                             myldap_get_dn(entry),attmap_passwd_uidNumber);
         return 0;
       }
+      else if (errno!=0)
+      {
+        log_log(LOG_WARNING,"passwd entry %s contains too large %s value",
+                            myldap_get_dn(entry),attmap_passwd_uidNumber);
+        return 0;
+      }
     }
   }
   /* get the gid for this entry */
@@ -355,13 +362,20 @@
                         myldap_get_dn(entry),attmap_passwd_gidNumber);
     return 0;
   }
-  gid=(gid_t)strtol(gidbuf,&tmp,0);
+  errno=0;
+  gid=strtogid(gidbuf,&tmp,0);
   if ((gidbuf[0]=='\0')||(*tmp!='\0'))
   {
     log_log(LOG_WARNING,"passwd entry %s contains non-numeric %s value",
                         myldap_get_dn(entry),attmap_passwd_gidNumber);
     return 0;
   }
+  else if (errno!=0)
+  {
+    log_log(LOG_WARNING,"passwd entry %s contains too large %s value",
+                        myldap_get_dn(entry),attmap_passwd_gidNumber);
+    return 0;
+  }
   /* get the gecos for this entry */
   attmap_get_value(entry,attmap_passwd_gecos,gecos,sizeof(gecos));
   /* get the home directory for this entry */

Modified: nss-pam-ldapd-0.7.15+squeeze/nslcd/protocol.c
==============================================================================
--- nss-pam-ldapd-0.7.15+squeeze/nslcd/protocol.c       Sun Sep 16 17:57:02 
2012        (r1771)
+++ nss-pam-ldapd-0.7.15+squeeze/nslcd/protocol.c       Thu Sep 20 20:34:03 
2012        (r1772)
@@ -5,7 +5,7 @@
 
    Copyright (C) 1997-2005 Luke Howard
    Copyright (C) 2006 West Consulting
-   Copyright (C) 2006, 2007, 2009, 2010 Arthur de Jong
+   Copyright (C) 2006, 2007, 2009, 2010, 2011 Arthur de Jong
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -143,6 +143,7 @@
     log_log(LOG_WARNING,"protocol entry %s contains multiple %s values",
                         myldap_get_dn(entry),attmap_protocol_ipProtocolNumber);
   }
+  errno=0;
   proto=(int)strtol(protos[0],&tmp,0);
   if ((*(protos[0])=='\0')||(*tmp!='\0'))
   {
@@ -150,6 +151,12 @@
                         myldap_get_dn(entry),attmap_protocol_ipProtocolNumber);
     return 0;
   }
+  else if (errno!=0)
+  {
+    log_log(LOG_WARNING,"protocol entry %s contains too large %s value",
+                        myldap_get_dn(entry),attmap_protocol_ipProtocolNumber);
+    return 0;
+  }
   /* write entry */
   WRITE_INT32(fp,NSLCD_RESULT_BEGIN);
   WRITE_STRING(fp,name);

Modified: nss-pam-ldapd-0.7.15+squeeze/nslcd/rpc.c
==============================================================================
--- nss-pam-ldapd-0.7.15+squeeze/nslcd/rpc.c    Sun Sep 16 17:57:02 2012        
(r1771)
+++ nss-pam-ldapd-0.7.15+squeeze/nslcd/rpc.c    Thu Sep 20 20:34:03 2012        
(r1772)
@@ -5,7 +5,7 @@
 
    Copyright (C) 1997-2005 Luke Howard
    Copyright (C) 2006 West Consulting
-   Copyright (C) 2006, 2007, 2009, 2010 Arthur de Jong
+   Copyright (C) 2006, 2007, 2009, 2010, 2011 Arthur de Jong
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -144,6 +144,7 @@
     log_log(LOG_WARNING,"rpc entry %s contains multiple %s values",
                         myldap_get_dn(entry),attmap_rpc_oncRpcNumber);
   }
+  errno=0;
   number=(int)strtol(numbers[0],&tmp,0);
   if ((*(numbers[0])=='\0')||(*tmp!='\0'))
   {
@@ -151,6 +152,12 @@
                         myldap_get_dn(entry),attmap_rpc_oncRpcNumber);
     return 0;
   }
+  else if (errno!=0)
+  {
+    log_log(LOG_WARNING,"rpc entry %s contains too large %s value",
+                        myldap_get_dn(entry),attmap_rpc_oncRpcNumber);
+    return 0;
+  }
   /* write the entry */
   WRITE_INT32(fp,NSLCD_RESULT_BEGIN);
   WRITE_STRING(fp,name);

Modified: nss-pam-ldapd-0.7.15+squeeze/nslcd/service.c
==============================================================================
--- nss-pam-ldapd-0.7.15+squeeze/nslcd/service.c        Sun Sep 16 17:57:02 
2012        (r1771)
+++ nss-pam-ldapd-0.7.15+squeeze/nslcd/service.c        Thu Sep 20 20:34:03 
2012        (r1772)
@@ -5,7 +5,7 @@
 
    Copyright (C) 1997-2005 Luke Howard
    Copyright (C) 2006 West Consulting
-   Copyright (C) 2006, 2007, 2009, 2010 Arthur de Jong
+   Copyright (C) 2006, 2007, 2009, 2010, 2011 Arthur de Jong
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -172,6 +172,7 @@
     log_log(LOG_WARNING,"service entry %s contains multiple %s values",
                         myldap_get_dn(entry),attmap_service_ipServicePort);
   }
+  errno=0;
   port=(int)strtol(ports[0],&tmp,0);
   if ((*(ports[0])=='\0')||(*tmp!='\0'))
   {
@@ -179,6 +180,12 @@
                         myldap_get_dn(entry),attmap_service_ipServicePort);
     return 0;
   }
+  else if (errno!=0)
+  {
+    log_log(LOG_WARNING,"service entry %s contains too large %s value",
+                        myldap_get_dn(entry),attmap_service_ipServicePort);
+    return 0;
+  }
   /* get protocols */
   protocols=myldap_get_values(entry,attmap_service_ipServiceProtocol);
   if ((protocols==NULL)||(protocols[0]==NULL))

Modified: nss-pam-ldapd-0.7.15+squeeze/nslcd/shadow.c
==============================================================================
--- nss-pam-ldapd-0.7.15+squeeze/nslcd/shadow.c Sun Sep 16 17:57:02 2012        
(r1771)
+++ nss-pam-ldapd-0.7.15+squeeze/nslcd/shadow.c Thu Sep 20 20:34:03 2012        
(r1772)
@@ -128,22 +128,34 @@
       return 0; /* error */
     strncpy(buffer,date,l);
     buffer[l]='\0';
+    errno=0;
     value=strtol(date,&tmp,0);
     if ((*date=='\0')||(*tmp!='\0'))
     {
       log_log(LOG_WARNING,"shadow entry contains non-numeric %s value",attr);
       return 0;
     }
+    else if (errno!=0)
+    {
+      log_log(LOG_WARNING,"shadow entry contains too large %s value",attr);
+      return -1;
+    }
     return value/864-134774;
     /* note that AD does not have expiry dates but a lastchangeddate
        and some value that needs to be added */
   }
+  errno=0;
   value=strtol(date,&tmp,0);
   if ((*date=='\0')||(*tmp!='\0'))
   {
     log_log(LOG_WARNING,"shadow entry contains non-numeric %s value",attr);
     return 0;
   }
+  else if (errno!=0)
+  {
+    log_log(LOG_WARNING,"shadow entry contains too large %s value",attr);
+    return -1;
+  }
   return value;
 }
 
@@ -155,12 +167,19 @@
   tmpvalue=attmap_get_value(entry,attmap_shadow_##att,buffer,sizeof(buffer)); \
   if (tmpvalue==NULL) \
     tmpvalue=""; \
+  errno=0; \
   var=strtol(tmpvalue,&tmp,0); \
   if ((*(tmpvalue)=='\0')||(*tmp!='\0')) \
   { \
     log_log(LOG_WARNING,"shadow entry %s contains non-numeric %s value", \
                         myldap_get_dn(entry),attmap_shadow_##att); \
     return 0; \
+  } \
+  else if (errno!=0) \
+  { \
+    log_log(LOG_WARNING,"shadow entry %s contains too large %s value", \
+                        myldap_get_dn(entry),attmap_shadow_##att); \
+    return 0; \
   }
 
 #define GET_OPTIONAL_DATE(var,att) \
-- 
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