VDB-103655 · CVE-2017-11342 · Nessus 261314

LibSass 3.4.5 ast.cpp input validation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in LibSass 3.4.5. This affects an unknown part of the file ast.cpp. The manipulation leads to input validation. This vulnerability is referenced as CVE-2017-11342. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in LibSass 3.4.5 (Programming Language Software). This issue affects some unknown processing of the file ast.cpp. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

There is an illegal address access in ast.cpp of LibSass 3.4.5. A crafted input will lead to a remote denial of service attack.

The bug was discovered 07/13/2017. The weakness was published 07/17/2017 (Website). It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2017-11342 since 07/15/2017. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 261314 (Linux Distros Unpatched Vulnerability : CVE-2017-11342), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (261314). Similar entry is available at VDB-103654. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Programming Language Software

Name

LibSass

Version

3.4.5

License

free

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 261314
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2017-11342

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/13/2017 🔍
07/15/2017 +2 days 🔍
07/17/2017 +2 days 🔍
07/17/2017 +0 days 🔍
07/18/2017 +1 days 🔍
09/08/2025 +2974 days 🔍

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2017-11342 (🔍)
GCVE (CVE): GCVE-0-2017-11342
GCVE (VulDB): GCVE-100-103655
See also: 🔍

Entryinfo

Created: 07/18/2017 09:08
Updated: 09/08/2025 20:35
Changes: 07/18/2017 09:08 (57), 10/26/2019 16:47 (1), 09/08/2025 20:35 (18)
Complete: 🔍
Cache ID: 216::103