#VU36925 Input validation error in js-bson - CVE-2018-13863

Vulnerability identifier: #VU36925

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-13863

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
js-bson
Web applications / JS libraries

Vendor: MongoDB, Inc.

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The MongoDB bson JavaScript module (also known as js-bson) versions 0.5.0 to 1.0.x before 1.0.5 is vulnerable to a Regular Expression Denial of Service (ReDoS) in lib/bson/decimal128.js. The flaw is triggered when the Decimal128.fromString() function is called to parse a long untrusted string.

Mitigation
Install update from vendor's website.

Vulnerable software versions

js-bson: 0.5.0 - 1.0.4

---

External links
https://github.com/mongodb/js-bson/commit/bd61c45157c53a1698ff23770160cf4783e9ea4a
https://snyk.io/vuln/npm:bson:20180225

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.