LibSass 3.4.5 parser.hpp lex resource management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in LibSass 3.4.5. Affected by this vulnerability is the function lex of the file parser.hpp. The manipulation results in resource management. This vulnerability is reported as CVE-2017-11554. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, was found in LibSass 3.4.5 (Programming Language Software). Affected is the function lex of the file parser.hpp. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. CVE summarizes:

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.

The bug was discovered 07/17/2017. The weakness was disclosed 07/23/2017 (Website). The advisory is shared for download at bugzilla.redhat.com. This vulnerability is traded as CVE-2017-11554 since 07/22/2017. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 104425 (openSUSE Security Update : libsass (openSUSE-2017-1250)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170547 (OpenSUSE Security Update for libsass (openSUSE-SU-2017:2939-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (104425). The entries VDB-104413, VDB-104414, VDB-104450 and VDB-104451 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 104425
Nessus Name: openSUSE Security Update : libsass (openSUSE-2017-1250)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

07/17/2017 🔍
07/22/2017 +5 days 🔍
07/22/2017 +0 days 🔍
07/23/2017 +1 days 🔍
07/23/2017 +0 days 🔍
11/07/2017 +107 days 🔍
11/07/2017 +0 days 🔍
12/13/2022 +1862 days 🔍

Sourcesinfo

Advisory: 2445
Status: Not defined

CVE: CVE-2017-11554 (🔍)
GCVE (CVE): GCVE-0-2017-11554
GCVE (VulDB): GCVE-100-104412
See also: 🔍

Entryinfo

Created: 07/23/2017 10:20
Updated: 12/13/2022 16:29
Changes: 07/23/2017 10:20 (69), 10/31/2019 16:10 (3), 12/13/2022 16:29 (4)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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