VDB-122623 · CVE-2018-14939 · BID 105047

LibreOffice up to 6.0.5 start.c get_app_path memory corruption

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.
8.5	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in LibreOffice up to 6.0.5. The affected element is the function get_app_path of the file desktop/unx/source/start.c. This manipulation causes memory corruption. This vulnerability appears as CVE-2018-14939. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in LibreOffice up to 6.0.5 (Office Suite Software). It has been declared as critical. Affected by this vulnerability is the function get_app_path of the file desktop/unx/source/start.c. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The get_app_path function in desktop/unx/source/start.c in LibreOffice through 6.0.5 mishandles the realpath function in certain environments such as FreeBSD libc, which might allow attackers to cause a denial of service (buffer overflow and application crash) or possibly have unspecified other impact if LibreOffice is automatically launched during web browsing with pathnames controlled by a remote web site.

The bug was discovered 07/23/2018. The weakness was presented 08/05/2018 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2018-14939 since 08/05/2018. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 13 days. During that time the estimated underground price was around $0-$5k.

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 SecurityFocus (BID 105047†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Office Suite Software

Name

LibreOffice

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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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: Memory corruption
CWE: CWE-119
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/23/2018 🔍
08/05/2018 +12 days 🔍
08/05/2018 +0 days 🔍
08/05/2018 +0 days 🔍
08/05/2018 +0 days 🔍
08/06/2018 +1 days 🔍
03/13/2020 +585 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Not defined

CVE: CVE-2018-14939 (🔍)
GCVE (CVE): GCVE-0-2018-14939
GCVE (VulDB): GCVE-100-122623
SecurityFocus: 105047 - LibreOffice CVE-2018-14939 Buffer Overflow Vulnerability

Entryinfo

Created: 08/06/2018 06:57
Updated: 03/13/2020 14:14
Changes: 08/06/2018 06:57 (59), 03/13/2020 14:14 (3)
Complete: 🔍
Cache ID: 216::103