CVE-2021-23369: Insufficient Information (NVD-CWE-noinfo)
value: The package handlebars before 4.7.7 are vulnerable to Remote Code Execution (RCE) when selecting certain compiling options to compile templates coming from an untrusted source.
CWE description: There is insufficient information about the issue to classify it; details are unkown or unspecified.
CVSS v3 base score: 9.8
Published: 2021-04-12T14:15Z
Repository: https://github.com/handlebars-lang/handlebars.js
Language: JavaScript
Files changed: lib/handlebars/compiler/javascript-compiler.js, package-lock.json, spec/security.js
Commit date: 2021-02-13 13:40:53 +0100
Commit message: fix: escape property names in compat mode (#1736)

Diff: diff --git a/lib/handlebars/compiler/javascript-compiler.js b/lib/handlebars/compiler/javascript-compiler.js
index 63f90bdc..db1c50c6 100644
--- a/lib/handlebars/compiler/javascript-compiler.js
+++ b/lib/handlebars/compiler/javascript-compiler.js
@@ -14,11 +14,16 @@ JavaScriptCompiler.prototype = {
   // alternative compiled forms for name lookup and buffering semantics
   nameLookup: function(parent, name /*,  type */) {
     return this.internalNameLookup(parent, name);
   },
   depthedLookup: function(name) {
-    return [this.aliasable('container.lookup'), '(depths, "', name, '")'];
+    return [
+      this.aliasable('container.lookup'),
+      '(depths, ',
+      JSON.stringify(name),
+      ')'
+    ];
   },
 
   compilerInfo: function() {
     const revision = COMPILER_REVISION,
       versions = REVISION_CHANGES[revision];
diff --git a/package-lock.json b/package-lock.json
index 28b4eb76..c9abea56 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,8 +1,8 @@
 {
   "name": "handlebars",
-  "version": "4.7.5",
+  "version": "4.7.6",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
     "@babel/code-frame": {
       "version": "7.8.3",
@@ -2824,11 +2824,11 @@
         "dts-critic": "^1.0.4",
         "fs-extra": "^6.0.1",
         "request": "^2.88.0",
         "strip-json-comments": "^2.0.1",
         "tslint": "^5.14.0",
-        "typescript": "^3.9.0-dev.20200402"
+        "typescript": "^4.3.0-dev.20210213"
       },
       "dependencies": {
         "fs-extra": {
           "version": "6.0.1",
           "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-6.0.1.tgz",
@@ -2839,13 +2839,13 @@
             "jsonfile": "^4.0.0",
             "universalify": "^0.1.0"
           }
         },
         "typescript": {
-          "version": "3.9.0-dev.20200402",
-          "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.0-dev.20200402.tgz",
-          "integrity": "sha512-CxOOy4lmaPnuyG34aP1kF2l++aou/IM+T0XsEeXZWb6xbIwx+3rt1DbLNS0pQIsLxi7NITq3x4M1qXhOQOAE6A==",
+          "version": "4.3.0-dev.20210213",
+          "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.0-dev.20210213.tgz",
+          "integrity": "sha512-zJG5QIkviTzzYRmKylVXIG2YTV7P18rKLclZu67WypYhsPtaC3KSDD5mOiXJsurDw5rqTqN/OgjQ37cpc11P3A==",
           "dev": true
         }
       }
     },
     "dustjs-linkedin": {
@@ -3902,632 +3902,18 @@
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
       "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
       "dev": true
     },
     "fsevents": {
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-      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-1.2.11.tgz",
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+      "version": "1.2.13",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-1.2.13.tgz",
+      "integrity": "sha512-oWb1Z6mkHIskLzEJ/XWX0srkpkTQ7vaopMQkyaEIoq0fmtFVxOthb8cCxeT+p3ynTdkk/RZwbgG4brR5BeWECw==",
       "dev": true,
       "optional": true,
       "requires": {
         "bindings": "^1.5.0",
-        "nan": "^2.12.1",
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-          "dev": true,
-          "optional": true,
-          "requires": {
-            "string-width": "^1.0.2 || 2"
-          }
-        },
-        "wrappy": {
-          "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-          "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-          "dev": true,
-          "optional": true
-        },
-        "yallist": {
-          "version": "3.1.1",
-          "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
-          "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==",
-          "dev": true,
-          "optional": true
-        }
+        "nan": "^2.12.1"
       }
     },
     "functional-red-black-tree": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz",
@@ -7634,13 +7020,13 @@
       "resolved": "https://registry.npmjs.org/mute-stream/-/mute-stream-0.0.8.tgz",
       "integrity": "sha512-nnbWWOkoWyUsTjKrhgD0dcz22mdkSnpYqbEjIm2nhwhuxlSkpywJmBo8h0ZqJdkp73mb90SssHkN4rsRaBAfAA==",
       "dev": true
     },
     "nan": {
-      "version": "2.14.0",
-      "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.0.tgz",
-      "integrity": "sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg==",
+      "version": "2.14.2",
+      "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.2.tgz",
+      "integrity": "sha512-M2ufzIiINKCuDfBSAUr1vWQ+vuVcA9kqx8JJUsbQi6yf1uGRyb7HfpdfUr5qLXf3B/t8dPvcjhKMmlfnP47EzQ==",
       "dev": true,
       "optional": true
     },
     "nanomatch": {
       "version": "1.2.13",
@@ -7819,13 +7205,10 @@
       "resolved": "https://registry.npmjs.org/nomnom/-/nomnom-0.4.3.tgz",
       "integrity": "sha1-bC2xJH3v9vZ1fjVyASOPB9lxhOM=",
       "dev": true,
       "requires": {
         "underscore": ">= 1.1.5"
-      },
-      "dependencies": {
-        "browserify": {}
       }
     },
     "nopt": {
       "version": "3.0.6",
       "resolved": "https://registry.npmjs.org/nopt/-/nopt-3.0.6.tgz",
diff --git a/spec/security.js b/spec/security.js
index 25aabeb7..2bc66f71 100644
--- a/spec/security.js
+++ b/spec/security.js
@@ -394,10 +394,32 @@ describe('security issues', function() {
           .withInput({ anArray: ['a', 'b', 'c'] })
           .toCompileTo('3');
       });
     });
   });
+
+  describe('escapes template variables', function() {
+    it('in compat mode', function() {
+      expectTemplate("{{'a\\b'}}")
+        .withCompileOptions({ compat: true })
+        .withInput({ 'a\\b': 'c' })
+        .toCompileTo('c');
+    });
+
+    it('in default mode', function() {
+      expectTemplate("{{'a\\b'}}")
+        .withCompileOptions()
+        .withInput({ 'a\\b': 'c' })
+        .toCompileTo('c');
+    });
+    it('in default mode', function() {
+      expectTemplate("{{'a\\b'}}")
+        .withCompileOptions({ strict: true })
+        .withInput({ 'a\\b': 'c' })
+        .toCompileTo('c');
+    });
+  });
 });
 
 function wrapToAdjustContainer(precompiledTemplateFunction) {
   return function templateFunctionWrapper(container /*, more args */) {
     delete container.lookupProperty;

Vulnerable code:     return [this.aliasable('container.lookup'), '(depths, "', name, '")'];
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      "version": "1.2.13",
      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-1.2.13.tgz",
      "integrity": "sha512-oWb1Z6mkHIskLzEJ/XWX0srkpkTQ7vaopMQkyaEIoq0fmtFVxOthb8cCxeT+p3ynTdkk/RZwbgG4brR5BeWECw==",
        "nan": "^2.12.1"
      "version": "2.14.2",
      "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.2.tgz",
      "integrity": "sha512-M2ufzIiINKCuDfBSAUr1vWQ+vuVcA9kqx8JJUsbQi6yf1uGRyb7HfpdfUr5qLXf3B/t8dPvcjhKMmlfnP47EzQ==",

  describe('escapes template variables', function() {
    it('in compat mode', function() {
      expectTemplate("{{'a\\b'}}")
        .withCompileOptions({ compat: true })
        .withInput({ 'a\\b': 'c' })
        .toCompileTo('c');
    });

    it('in default mode', function() {
      expectTemplate("{{'a\\b'}}")
        .withCompileOptions()
        .withInput({ 'a\\b': 'c' })
        .toCompileTo('c');
    });
    it('in default mode', function() {
      expectTemplate("{{'a\\b'}}")
        .withCompileOptions({ strict: true })
        .withInput({ 'a\\b': 'c' })
        .toCompileTo('c');
    });
  });