{
   "CVE_data_meta" : {
      "ASSIGNER" : "cve@mitre.org",
      "ID" : "CVE-2013-4206",
      "STATE" : "PUBLIC"
   },
   "affects" : {
      "vendor" : {
         "vendor_data" : [
            {
               "product" : {
                  "product_data" : [
                     {
                        "product_name" : "n/a",
                        "version" : {
                           "version_data" : [
                              {
                                 "version_value" : "n/a"
                              }
                           ]
                        }
                     }
                  ]
               },
               "vendor_name" : "n/a"
            }
         ]
      }
   },
   "data_format" : "MITRE",
   "data_type" : "CVE",
   "data_version" : "4.0",
   "description" : {
      "description_data" : [
         {
            "lang" : "eng",
            "value" : "Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication."
         }
      ]
   },
   "problemtype" : {
      "problemtype_data" : [
         {
            "description" : [
               {
                  "lang" : "eng",
                  "value" : "n/a"
               }
            ]
         }
      ]
   },
   "references" : {
      "reference_data" : [
         {
            "name" : "[oss-security] 20130806 CVE request: three additional flaws fixed in putty 0.63",
            "refsource" : "MLIST",
            "url" : "http://www.openwall.com/lists/oss-security/2013/08/06/11"
         },
         {
            "name" : "http://svn.tartarus.org/sgt/putty/sshbn.c?sortby=date&r1=9977&r2=9976&pathrev=9977",
            "refsource" : "CONFIRM",
            "url" : "http://svn.tartarus.org/sgt/putty/sshbn.c?sortby=date&r1=9977&r2=9976&pathrev=9977"
         },
         {
            "name" : "http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modmul.html",
            "refsource" : "CONFIRM",
            "url" : "http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modmul.html"
         },
         {
            "name" : "DSA-2736",
            "refsource" : "DEBIAN",
            "url" : "http://www.debian.org/security/2013/dsa-2736"
         },
         {
            "name" : "openSUSE-SU-2013:1347",
            "refsource" : "SUSE",
            "url" : "http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.html"
         },
         {
            "name" : "54379",
            "refsource" : "SECUNIA",
            "url" : "http://secunia.com/advisories/54379"
         },
         {
            "name" : "54533",
            "refsource" : "SECUNIA",
            "url" : "http://secunia.com/advisories/54533"
         }
      ]
   }
}