Liblouis up to 3.6 lou_translateString.c matchCurrentInput out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Liblouis up to 3.6. It has been declared as problematic. The impacted element is the function matchCurrentInput of the file lou_translateString.c. Such manipulation leads to out-of-bounds. This vulnerability is referenced as CVE-2018-17294. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Liblouis up to 3.6 and classified as problematic. Affected by this issue is the function matchCurrentInput of the file lou_translateString.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. CVE summarizes:

The matchCurrentInput function inside lou_translateString.c of Liblouis prior to 3.7 does not check the input string's length, allowing attackers to cause a denial of service (application crash via out-of-bounds read) by crafting an input file with certain translation dictionaries.

The bug was discovered 09/01/2018. The weakness was published 09/21/2018 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2018-17294 since 09/21/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 20 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 117963 (Fedora 27 : liblouis (2018-9a09435935)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197267 (Ubuntu Security Notification for Liblouis Vulnerabilities (USN-3782-1)).

Upgrading to version 3.7 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (117963) and SecurityFocus (BID 105511†). Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
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: 117963
Nessus Name: Fedora 27 : liblouis (2018-9a09435935)
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: 🔍

Upgrade: Liblouis 3.7
Patch: github.com

Timelineinfo

09/01/2018 🔍
09/21/2018 +19 days 🔍
09/21/2018 +0 days 🔍
09/21/2018 +0 days 🔍
09/21/2018 +0 days 🔍
09/24/2018 +3 days 🔍
10/07/2018 +13 days 🔍
10/09/2018 +2 days 🔍
05/17/2023 +1681 days 🔍

Sourcesinfo

Product: github.com

Advisory: FEDORA-2018-9a09435935
Status: Confirmed

CVE: CVE-2018-17294 (🔍)
GCVE (CVE): GCVE-0-2018-17294
GCVE (VulDB): GCVE-100-124340
SecurityFocus: 105511 - Liblouis CVE-2018-17294 Stack Based Buffer Overflow Vulnerability

Entryinfo

Created: 09/21/2018 17:17
Updated: 05/17/2023 14:13
Changes: 09/21/2018 17:17 (74), 03/26/2020 10:11 (4), 05/17/2023 14:11 (5), 05/17/2023 14:12 (1), 05/17/2023 14:13 (1)
Complete: 🔍
Cache ID: 216::103

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