jQuery prototype pollution in Backdrop CMS



Published: 2019-04-22
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-11358
CWE ID CWE-400
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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Backdrop CMS
Web applications / CMS

Vendor Backdrop CMS

Security Advisory

This security advisory describes one low risk vulnerability.

1) Prototype pollution

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-11358

CWE-ID: CWE-400 - Uncontrolled Resource Consumption ('Resource Exhaustion')

Exploit availability: Yes

Description

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

The vulnerability exists due to prototype pollution. A remote attacker can trick the extend function can into modifying the prototype of Object when the attacker controls part of the structure passed to this function. This can let an attacker add or modify an existing property that will then exist on all objects and perform a denial of service (DoS) attack.

Mitigation

Update to version 1.12.6 or 1.11.9.

Vulnerable software versions

Backdrop CMS: 1.11.0, 1.11.1, 1.11.2, 1.11.3, 1.11.4, 1.11.5, 1.11.6, 1.11.7, 1.11.8, 1.12.0, 1.12.1, 1.12.2, 1.12.3, 1.12.4, 1.12.5

CPE External links

https://backdropcms.org/security/backdrop-sa-core-2019-009

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. However, proof of concept for this vulnerability is available.



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