GNU Libextractor up to 1.8 plugins/ole2_extractor.c process_metadata null pointer dereference

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

Summaryinfo

A vulnerability, which was classified as problematic, has been found in GNU Libextractor up to 1.8. This affects the function process_metadata of the file plugins/ole2_extractor.c. Performing a manipulation results in null pointer dereference. This vulnerability is reported as CVE-2018-20431. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in GNU Libextractor up to 1.8. This affects the function process_metadata of the file plugins/ole2_extractor.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

GNU Libextractor through 1.8 has a NULL Pointer Dereference vulnerability in the function process_metadata() in plugins/ole2_extractor.c.

The bug was discovered 12/20/2018. The weakness was disclosed 12/24/2018 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is uniquely identified as CVE-2018-20431 since 12/23/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. 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 4 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 119943 (Debian DSA-4361-1 : libextractor - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176553 (Debian Security Update for libextractor (DSA 4361-1)).

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

The vulnerability is also documented in the databases at Tenable (119943) and SecurityFocus (BID 106300†). The entry VDB-128366 is pretty similar. Be aware that VulDB is the high quality 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: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / 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: 119943
Nessus Name: Debian DSA-4361-1 : libextractor - security update
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: 🔍

Patch: gnunet.org

Timelineinfo

12/20/2018 🔍
12/23/2018 +3 days 🔍
12/24/2018 +1 days 🔍
12/24/2018 +0 days 🔍
12/24/2018 +0 days 🔍
12/24/2018 +0 days 🔍
12/28/2018 +4 days 🔍
12/31/2018 +3 days 🔍
06/20/2023 +1632 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: DLA 1616-1⛔
Status: Confirmed

CVE: CVE-2018-20431 (🔍)
GCVE (CVE): GCVE-0-2018-20431
GCVE (VulDB): GCVE-100-128367
SecurityFocus: 106300 - GNU Libextractor Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 12/24/2018 10:03
Updated: 06/20/2023 19:43
Changes: 12/24/2018 10:03 (74), 04/23/2020 20:43 (5), 06/20/2023 19:43 (5)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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