Vulnerability identifier: #VU38654

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-11554

CWE-ID: CWE-674

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 non-authenticated attacker to perform a denial of service (DoS) attack.

There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service.

Mitigation
Install update from vendor's website.

Vulnerable software versions

LibSass: 3.4.5

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=1471780
http://github.com/sass/libsass/issues/2445

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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.