#VU36350 NULL pointer dereference in LibSass - CVE-2018-19797

Vulnerability identifier: #VU36350

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-19797

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. A remote attacker can trigger denial of service conditions via a crafted sass input file.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

LibSass: 3.5.5

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External links
https://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html
https://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html
https://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html
https://github.com/sass/libsass/issues/2779

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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.