VDB-127915 · CVE-2018-20096 · RHSA-2019:2101

Exiv2 0.27-RC3 pngimage.cpp Exiv2::tEXtToDataBuf 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.
6.9	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in Exiv2 0.27-RC3. The impacted element is the function Exiv2::tEXtToDataBuf of the file pngimage.cpp. This manipulation causes memory corruption. This vulnerability is registered as CVE-2018-20096. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Exiv2 0.27-RC3 (Image Processing Software). It has been declared as critical. Affected by this vulnerability is the function Exiv2::tEXtToDataBuf of the file pngimage.cpp. 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:

There is a heap-based buffer over-read in the Exiv2::tEXtToDataBuf function of pngimage.cpp in Exiv2 0.27-RC3. A crafted input will lead to a remote denial of service attack.

The bug was discovered 12/10/2018. The weakness was published 12/12/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2018-20096 since 12/12/2018. 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 2 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.

Similar entries are available at VDB-127916, VDB-127917 and VDB-127918. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Image Processing Software

Name

Exiv2

Version

0.27-RC3

License

free

Website

Product: https://github.com/Exiv2/exiv2/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.9

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

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

12/10/2018 🔍
12/12/2018 +2 days 🔍
12/12/2018 +0 days 🔍
12/12/2018 +0 days 🔍
12/13/2018 +1 days 🔍
06/18/2023 +1648 days 🔍

Sourcesinfo

Product: github.com

Advisory: RHSA-2019:2101
Status: Not defined

CVE: CVE-2018-20096 (🔍)
GCVE (CVE): GCVE-0-2018-20096
GCVE (VulDB): GCVE-100-127915
See also: 🔍

Entryinfo

Created: 12/13/2018 10:05
Updated: 06/18/2023 15:48
Changes: 12/13/2018 10:05 (58), 04/20/2020 16:39 (1), 06/18/2023 15:48 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.