CVE-2021-21277
In angular-expressions before version 1.1.2 there is a vulnerability which allows Remote Code Execution if you call "expressions.compile(userControlledInput)" where "userControlledInput" is text that comes from user input.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.73%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
angular-expressions is "angular's nicest part extracted as a standalone module for the browser and node". In angular-expressions before version 1.1.2 there is a vulnerability which allows Remote Code Execution if you call "expressions.compile(userControlledInput)" where "userControlledInput" is text that comes from user input. The security of the package could be bypassed by using a more complex payload, using a ".constructor.constructor" technique. In terms of impact: If running angular-expressions in the browser, an attacker could run any browser script when the application code calls expressions.compile(userControlledInput). If running angular-expressions on the server, an attacker could run any Javascript expression, thus gaining Remote Code Execution. This is fixed in version 1.1.2 of angular-expressions A temporary workaround might be either to disable user-controlled input that will be fed into angular-expressions in your application or allow only following characters in the userControlledInput.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.73% probability · 85th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-74, CWE-94
- Affected
- peerigon/angular-expressions
- Source
- security-advisories@github.com
References
- http://blog.angularjs.org/2016/09/angular-16-expression-sandbox-removal.htmlBroken Link, Vendor Advisory
- https://github.com/peerigon/angular-expressions/commit/07edb62902b1f6127b3dcc013da61c6316dd0bf1Patch, Third Party Advisory
- https://github.com/peerigon/angular-expressions/security/advisories/GHSA-j6px-jwvv-vpwqVendor Advisory
- https://www.npmjs.com/package/angular-expressionsProduct
- http://blog.angularjs.org/2016/09/angular-16-expression-sandbox-removal.htmlBroken Link, Vendor Advisory
- https://github.com/peerigon/angular-expressions/commit/07edb62902b1f6127b3dcc013da61c6316dd0bf1Patch, Third Party Advisory
- https://github.com/peerigon/angular-expressions/security/advisories/GHSA-j6px-jwvv-vpwqVendor Advisory
- https://www.npmjs.com/package/angular-expressionsProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.