Skip to content

fix(eval): rce using non-string prop names #237

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Feb 14, 2025
Merged

fix(eval): rce using non-string prop names #237

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion badges/tests-badge.svg
View file
Open in desktop
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
9 changes: 7 additions & 2 deletions dist/index-browser-esm.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1297,8 +1297,13 @@ const SafeEval = {
return ast.value;
},
evalMemberExpression(ast, subs) {
const prop = ast.computed ? SafeEval.evalAst(ast.property) // `object[property]`
: ast.property.name; // `object.property` property is Identifier
const prop = String(
// NOTE: `String(value)` throws error when
// value has overwritten the toString method to return non-string
// i.e. `value = {toString: () => []}`
ast.computed ? SafeEval.evalAst(ast.property) // `object[property]`
: ast.property.name // `object.property` property is Identifier
);
const obj = SafeEval.evalAst(ast.object, subs);
if (obj === undefined || obj === null) {
throw TypeError(`Cannot read properties of ${obj} (reading '${prop}')`);
Expand Down
2 changes: 1 addition & 1 deletion dist/index-browser-esm.min.js
View file
Open in desktop

Large diffs are not rendered by default.

2 changes: 1 addition & 1 deletion dist/index-browser-esm.min.js.map
View file
Open in desktop

Large diffs are not rendered by default.

9 changes: 7 additions & 2 deletions dist/index-browser-umd.cjs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1303,8 +1303,13 @@
return ast.value;
},
evalMemberExpression(ast, subs) {
const prop = ast.computed ? SafeEval.evalAst(ast.property) // `object[property]`
: ast.property.name; // `object.property` property is Identifier
const prop = String(
// NOTE: `String(value)` throws error when
// value has overwritten the toString method to return non-string
// i.e. `value = {toString: () => []}`
ast.computed ? SafeEval.evalAst(ast.property) // `object[property]`
: ast.property.name // `object.property` property is Identifier
);
const obj = SafeEval.evalAst(ast.object, subs);
if (obj === undefined || obj === null) {
throw TypeError(`Cannot read properties of ${obj} (reading '${prop}')`);
Expand Down
2 changes: 1 addition & 1 deletion dist/index-browser-umd.min.cjs
View file
Open in desktop

Large diffs are not rendered by default.

2 changes: 1 addition & 1 deletion dist/index-browser-umd.min.cjs.map
View file
Open in desktop

Large diffs are not rendered by default.

9 changes: 7 additions & 2 deletions dist/index-node-cjs.cjs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1298,8 +1298,13 @@ const SafeEval = {
return ast.value;
},
evalMemberExpression(ast, subs) {
const prop = ast.computed ? SafeEval.evalAst(ast.property) // `object[property]`
: ast.property.name; // `object.property` property is Identifier
const prop = String(
// NOTE: `String(value)` throws error when
// value has overwritten the toString method to return non-string
// i.e. `value = {toString: () => []}`
ast.computed ? SafeEval.evalAst(ast.property) // `object[property]`
: ast.property.name // `object.property` property is Identifier
);
const obj = SafeEval.evalAst(ast.object, subs);
if (obj === undefined || obj === null) {
throw TypeError(`Cannot read properties of ${obj} (reading '${prop}')`);
Expand Down
9 changes: 7 additions & 2 deletions dist/index-node-esm.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1296,8 +1296,13 @@ const SafeEval = {
return ast.value;
},
evalMemberExpression(ast, subs) {
const prop = ast.computed ? SafeEval.evalAst(ast.property) // `object[property]`
: ast.property.name; // `object.property` property is Identifier
const prop = String(
// NOTE: `String(value)` throws error when
// value has overwritten the toString method to return non-string
// i.e. `value = {toString: () => []}`
ast.computed ? SafeEval.evalAst(ast.property) // `object[property]`
: ast.property.name // `object.property` property is Identifier
);
const obj = SafeEval.evalAst(ast.object, subs);
if (obj === undefined || obj === null) {
throw TypeError(`Cannot read properties of ${obj} (reading '${prop}')`);
Expand Down
2 changes: 1 addition & 1 deletion docs/ts/assets/icons.js
View file
Open in desktop

Large diffs are not rendered by default.

2 changes: 1 addition & 1 deletion docs/ts/assets/icons.svg
View file
Open in desktop
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
2 changes: 1 addition & 1 deletion docs/ts/assets/main.js
View file
Open in desktop

Large diffs are not rendered by default.

87 changes: 66 additions & 21 deletions docs/ts/assets/style.css
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,11 +4,17 @@
--light-color-background-secondary: #eff0f1;
--light-color-warning-text: #222;
--light-color-background-warning: #e6e600;
--light-color-icon-background: var(--light-color-background);
--light-color-accent: #c5c7c9;
--light-color-active-menu-item: var(--light-color-accent);
--light-color-text: #222;
--light-color-text-aside: #6e6e6e;

--light-color-icon-background: var(--light-color-background);
--light-color-icon-text: var(--light-color-text);

--light-color-comment-tag-text: var(--light-color-text);
--light-color-comment-tag: var(--light-color-background);

--light-color-link: #1f70c2;
--light-color-focus-outline: #3584e4;

Expand All @@ -22,16 +28,17 @@
--light-color-ts-function: #572be7;
--light-color-ts-class: #1f70c2;
--light-color-ts-interface: #108024;
--light-color-ts-constructor: var(--light-color-ts-class);
--light-color-ts-property: var(--light-color-ts-variable);
--light-color-ts-method: var(--light-color-ts-function);
--light-color-ts-constructor: #4d7fff;
--light-color-ts-property: #ff984d;
--light-color-ts-method: #ff4db8;
--light-color-ts-reference: #ff4d82;
--light-color-ts-call-signature: var(--light-color-ts-method);
--light-color-ts-index-signature: var(--light-color-ts-property);
--light-color-ts-constructor-signature: var(--light-color-ts-constructor);
--light-color-ts-parameter: var(--light-color-ts-variable);
/* type literal not included as links will never be generated to it */
--light-color-ts-type-parameter: #a55c0e;
--light-color-ts-accessor: var(--light-color-ts-property);
--light-color-ts-accessor: #ff4d4d;
--light-color-ts-get-signature: var(--light-color-ts-accessor);
--light-color-ts-set-signature: var(--light-color-ts-accessor);
--light-color-ts-type-alias: #d51270;
Expand All @@ -46,11 +53,17 @@
--dark-color-background-secondary: #1e2024;
--dark-color-background-warning: #bebe00;
--dark-color-warning-text: #222;
--dark-color-icon-background: var(--dark-color-background-secondary);
--dark-color-accent: #9096a2;
--dark-color-active-menu-item: #5d5d6a;
--dark-color-text: #f5f5f5;
--dark-color-text-aside: #dddddd;

--dark-color-icon-background: var(--dark-color-background-secondary);
--dark-color-icon-text: var(--dark-color-text);

--dark-color-comment-tag-text: var(--dark-color-text);
--dark-color-comment-tag: var(--dark-color-background);

--dark-color-link: #00aff4;
--dark-color-focus-outline: #4c97f2;

Expand All @@ -64,16 +77,17 @@
--dark-color-ts-function: #a280ff;
--dark-color-ts-class: #8ac4ff;
--dark-color-ts-interface: #6cff87;
--dark-color-ts-constructor: var(--dark-color-ts-class);
--dark-color-ts-property: var(--dark-color-ts-variable);
--dark-color-ts-method: var(--dark-color-ts-function);
--dark-color-ts-constructor: #4d7fff;
--dark-color-ts-property: #ff984d;
--dark-color-ts-method: #ff4db8;
--dark-color-ts-reference: #ff4d82;
--dark-color-ts-call-signature: var(--dark-color-ts-method);
--dark-color-ts-index-signature: var(--dark-color-ts-property);
--dark-color-ts-constructor-signature: var(--dark-color-ts-constructor);
--dark-color-ts-parameter: var(--dark-color-ts-variable);
/* type literal not included as links will never be generated to it */
--dark-color-ts-type-parameter: #e07d13;
--dark-color-ts-accessor: var(--dark-color-ts-property);
--dark-color-ts-accessor: #ff4d4d;
--dark-color-ts-get-signature: var(--dark-color-ts-accessor);
--dark-color-ts-set-signature: var(--dark-color-ts-accessor);
--dark-color-ts-type-alias: #ff6492;
Expand All @@ -90,15 +104,22 @@
--color-background-secondary: var(--light-color-background-secondary);
--color-background-warning: var(--light-color-background-warning);
--color-warning-text: var(--light-color-warning-text);
--color-icon-background: var(--light-color-icon-background);
--color-accent: var(--light-color-accent);
--color-active-menu-item: var(--light-color-active-menu-item);
--color-text: var(--light-color-text);
--color-text-aside: var(--light-color-text-aside);

--color-icon-background: var(--light-color-icon-background);
--color-icon-text: var(--light-color-icon-text);

--color-comment-tag-text: var(--light-color-text);
--color-comment-tag: var(--light-color-background);

--color-link: var(--light-color-link);
--color-focus-outline: var(--light-color-focus-outline);

--color-ts-keyword: var(--light-color-ts-keyword);
--color-ts-project: var(--light-color-ts-project);
--color-ts-module: var(--light-color-ts-module);
--color-ts-namespace: var(--light-color-ts-namespace);
--color-ts-enum: var(--light-color-ts-enum);
Expand All @@ -110,6 +131,7 @@
--color-ts-constructor: var(--light-color-ts-constructor);
--color-ts-property: var(--light-color-ts-property);
--color-ts-method: var(--light-color-ts-method);
--color-ts-reference: var(--light-color-ts-reference);
--color-ts-call-signature: var(--light-color-ts-call-signature);
--color-ts-index-signature: var(--light-color-ts-index-signature);
--color-ts-constructor-signature: var(
Expand All @@ -134,15 +156,22 @@
--color-background-secondary: var(--dark-color-background-secondary);
--color-background-warning: var(--dark-color-background-warning);
--color-warning-text: var(--dark-color-warning-text);
--color-icon-background: var(--dark-color-icon-background);
--color-accent: var(--dark-color-accent);
--color-active-menu-item: var(--dark-color-active-menu-item);
--color-text: var(--dark-color-text);
--color-text-aside: var(--dark-color-text-aside);

--color-icon-background: var(--dark-color-icon-background);
--color-icon-text: var(--dark-color-icon-text);

--color-comment-tag-text: var(--dark-color-text);
--color-comment-tag: var(--dark-color-background);

--color-link: var(--dark-color-link);
--color-focus-outline: var(--dark-color-focus-outline);

--color-ts-keyword: var(--dark-color-ts-keyword);
--color-ts-project: var(--dark-color-ts-project);
--color-ts-module: var(--dark-color-ts-module);
--color-ts-namespace: var(--dark-color-ts-namespace);
--color-ts-enum: var(--dark-color-ts-enum);
Expand All @@ -154,6 +183,7 @@
--color-ts-constructor: var(--dark-color-ts-constructor);
--color-ts-property: var(--dark-color-ts-property);
--color-ts-method: var(--dark-color-ts-method);
--color-ts-reference: var(--dark-color-ts-reference);
--color-ts-call-signature: var(--dark-color-ts-call-signature);
--color-ts-index-signature: var(--dark-color-ts-index-signature);
--color-ts-constructor-signature: var(
Expand Down Expand Up @@ -190,10 +220,16 @@ body {
--color-active-menu-item: var(--light-color-active-menu-item);
--color-text: var(--light-color-text);
--color-text-aside: var(--light-color-text-aside);
--color-icon-text: var(--light-color-icon-text);

--color-comment-tag-text: var(--light-color-text);
--color-comment-tag: var(--light-color-background);

--color-link: var(--light-color-link);
--color-focus-outline: var(--light-color-focus-outline);

--color-ts-keyword: var(--light-color-ts-keyword);
--color-ts-project: var(--light-color-ts-project);
--color-ts-module: var(--light-color-ts-module);
--color-ts-namespace: var(--light-color-ts-namespace);
--color-ts-enum: var(--light-color-ts-enum);
Expand All @@ -205,6 +241,7 @@ body {
--color-ts-constructor: var(--light-color-ts-constructor);
--color-ts-property: var(--light-color-ts-property);
--color-ts-method: var(--light-color-ts-method);
--color-ts-reference: var(--light-color-ts-reference);
--color-ts-call-signature: var(--light-color-ts-call-signature);
--color-ts-index-signature: var(--light-color-ts-index-signature);
--color-ts-constructor-signature: var(
Expand Down Expand Up @@ -232,10 +269,16 @@ body {
--color-active-menu-item: var(--dark-color-active-menu-item);
--color-text: var(--dark-color-text);
--color-text-aside: var(--dark-color-text-aside);
--color-icon-text: var(--dark-color-icon-text);

--color-comment-tag-text: var(--dark-color-text);
--color-comment-tag: var(--dark-color-background);

--color-link: var(--dark-color-link);
--color-focus-outline: var(--dark-color-focus-outline);

--color-ts-keyword: var(--dark-color-ts-keyword);
--color-ts-project: var(--dark-color-ts-project);
--color-ts-module: var(--dark-color-ts-module);
--color-ts-namespace: var(--dark-color-ts-namespace);
--color-ts-enum: var(--dark-color-ts-enum);
Expand All @@ -247,6 +290,7 @@ body {
--color-ts-constructor: var(--dark-color-ts-constructor);
--color-ts-property: var(--dark-color-ts-property);
--color-ts-method: var(--dark-color-ts-method);
--color-ts-reference: var(--dark-color-ts-reference);
--color-ts-call-signature: var(--dark-color-ts-call-signature);
--color-ts-index-signature: var(--dark-color-ts-index-signature);
--color-ts-constructor-signature: var(
Expand Down Expand Up @@ -439,7 +483,6 @@ pre {

pre {
position: relative;
white-space: pre;
white-space: pre-wrap;
word-wrap: break-word;
padding: 10px;
Expand Down Expand Up @@ -860,17 +903,19 @@ a.tsd-index-link {
margin-bottom: 0.75rem;
}

.tsd-no-select {
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
.tsd-kind-icon {
margin-right: 0.5rem;
width: 1.25rem;
height: 1.25rem;
min-width: 1.25rem;
min-height: 1.25rem;
}
.tsd-kind-icon path {
transform-origin: center;
transform: scale(1.1);
}
.tsd-signature > .tsd-kind-icon {
margin-right: 0.8rem;
}
Expand Down Expand Up @@ -1242,6 +1287,9 @@ img {
.tsd-kind-method {
color: var(--color-ts-method);
}
.tsd-kind-reference {
color: var(--color-ts-reference);
}
.tsd-kind-call-signature {
color: var(--color-ts-call-signature);
}
Expand All @@ -1254,9 +1302,6 @@ img {
.tsd-kind-parameter {
color: var(--color-ts-parameter);
}
.tsd-kind-type-literal {
color: var(--color-ts-type-literal);
}
.tsd-kind-type-parameter {
color: var(--color-ts-type-parameter);
}
Expand Down Expand Up @@ -1435,7 +1480,7 @@ img {
}

.site-menu {
margin-top: 1rem 0;
margin-top: 1rem;
}

.page-menu,
Expand Down
Loading