FontForge prior 20200314 SFD File Parser out-of-bounds write

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CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

A vulnerability, which was classified as critical, was found in FontForge. Affected is some unknown processing of the component SFD File Parser. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-787. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

The weakness was shared 02/23/2021. The advisory is available at bugzilla.redhat.com. This vulnerability is traded as CVE-2020-25690 since 09/16/2020. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

Upgrading to version 20200314 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

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VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔒

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

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Exploitinginfoedit

Class: Memory corruption
CWE: CWE-787
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FontForge 20200314

Timelineinfoedit

03/14/2020 Countermeasure disclosed
09/16/2020 +185 days CVE assigned
02/23/2021 +160 days Advisory disclosed
02/23/2021 +0 days VulDB entry created
03/04/2021 +9 days VulDB last update

Sourcesinfoedit

Advisory: bugzilla.redhat.com
Status: Confirmed

CVE: CVE-2020-25690 (🔒)

Entryinfoedit

Created: 02/23/2021 07:41 AM
Updated: 03/04/2021 11:49 AM
Changes: (18) vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai vulnerability_cvss3_meta_basescore vulnerability_cvss3_meta_tempscore vulnerability_cvss2_nvd_basescore vulnerability_cvss3_nvd_basescore
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