VDB-237721 · CVE-2020-18768 · GCVE-0-2020-18768

LibTIFF up to 4.0.10 TIFF File tif_unix.c _TIFFmemcpy heap-based overflow

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.
5.5	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in LibTIFF up to 4.0.10. Affected by this vulnerability is the function _TIFFmemcpy of the file tif_unix.c of the component TIFF File Handler. This manipulation causes heap-based overflow. This vulnerability is handled as CVE-2020-18768. There is not any exploit available.

Detailsinfo

A vulnerability has been found in LibTIFF up to 4.0.10 (Image Processing Software) and classified as critical. Affected by this vulnerability is the function _TIFFmemcpy of the file tif_unix.c of the component TIFF File Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

There exists one heap buffer overflow in _TIFFmemcpy in tif_unix.c in libtiff 4.0.10, which allows an attacker to cause a denial-of-service through a crafted tiff file.

The weakness was released 08/23/2023. The advisory is shared at bugzilla.maptools.org. This vulnerability is known as CVE-2020-18768 since 08/13/2020. Technical details are known, but no exploit is available.

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Image Processing Software

Name

LibTIFF

Version

License

open-source

Website

Product: http://www.libtiff.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
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: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/13/2020 🔍
08/23/2023 +1105 days 🔍
08/23/2023 +0 days 🔍
09/14/2023 +22 days 🔍

Sourcesinfo

Product: libtiff.org

Advisory: bugzilla.maptools.org
Status: Not defined

CVE: CVE-2020-18768 (🔍)
GCVE (CVE): GCVE-0-2020-18768
GCVE (VulDB): GCVE-100-237721

Entryinfo

Created: 08/23/2023 07:59
Updated: 09/14/2023 15:16
Changes: 08/23/2023 07:59 (40), 09/14/2023 15:16 (9)
Complete: 🔍
Cache ID: 216::103