SoftMaker Office 2021 PlanMaker integer underflow

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

A vulnerability, which was classified as critical, was found in SoftMaker Office 2021. This affects some unknown functionality of the component PlanMaker. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-191. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An exploitable integer overflow vulnerability exists in the PlanMaker document parsing functionality of SoftMaker Office 2021’s PlanMaker application. A specially crafted document can cause the document parser perform arithmetic that may overflow which can result in an undersized heap allocation. Later when copying data from the file into this allocation, a heap-based buffer overflow will occur which can corrupt memory. These types of memory corruptions can allow for code execution under the context of the application. An attacker can entice the victim to open a document to trigger this vulnerability.

The weakness was published 02/04/2021 as TALOS-2020-1190. The advisory is shared at talosintelligence.com. This vulnerability is uniquely identified as CVE-2020-13579 since 05/26/2020. The exploitability is told to be easy. 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. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/23/2021).

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

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VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Memory corruption
CWE: CWE-191
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Countermeasuresinfoedit

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

05/26/2020 CVE assigned
02/04/2021 +254 days Advisory disclosed
02/04/2021 +0 days VulDB entry created
02/23/2021 +19 days VulDB last update

Sourcesinfoedit

Advisory: TALOS-2020-1190
Status: Not defined

CVE: CVE-2020-13579 (🔒)

Entryinfoedit

Created: 02/04/2021 06:43 PM
Updated: 02/23/2021 02:03 PM
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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