#VU76836 NULL pointer dereference in LibSass - CVE-2018-11694

Vulnerability identifier: #VU76836

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-11694

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
LibSass
Universal components / Libraries / Libraries used by multiple products

Vendor: Sass

Description

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

The vulnerability exists due to a NULL pointer dereference error in the function Sass::Functions::selector_append. A remote attacker can trick the victim into opening specially crafted data and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

LibSass: 3.3.6 - 3.5.4

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External links
https://github.com/sass/libsass/issues/2663

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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.