libxls up to 1.6.0 XLS Cell Parser libxls/xls2csv.c null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in libxls up to 1.6.0. The impacted element is an unknown function of the file libxls/xls2csv.c of the component XLS Cell Parser. Such manipulation leads to null pointer dereference. This vulnerability is documented as CVE-2020-27819. The attack can be executed remotely. Additionally, an exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in libxls up to 1.6.0 and classified as problematic. Affected by this issue is an unknown functionality of the file libxls/xls2csv.c of the component XLS Cell Parser. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability.

The weakness was released 02/23/2021. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2020-27819. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept.

Upgrading to version 1.6.1 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
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: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libxls 1.6.1

Timelineinfo

10/27/2020 🔍
02/23/2021 +119 days 🔍
02/23/2021 +0 days 🔍
03/04/2021 +9 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2020-27819 (🔍)
GCVE (CVE): GCVE-0-2020-27819
GCVE (VulDB): GCVE-100-170276
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/23/2021 07:44
Updated: 03/04/2021 12:10
Changes: 02/23/2021 07:44 (41), 03/04/2021 12:07 (2), 03/04/2021 12:10 (18)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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