Arbitrary code execution via malformed field parsing
Published May 6, 2021 · Updated Oct 17, 2024
Use-after-free in GetData 0.10.0 allows context-dependent attackers to execute arbitrary code through a crafted Dirfile database. In _GD_ParseFragment, a malformed field specification can make _GD_ParseFieldSpec return NULL, but parsing continues without setting GD_E_BAD_DIRFILE, allowing later encoding-support processing to access freed heap memory. Triggering requires a consuming application to process attacker-controlled Dirfile data; exploitation can crash that process or execute code with its privileges.
Summary
What happened
Use-after-free in GetData 0.10.0 allows context-dependent attackers to execute arbitrary code through a crafted Dirfile database. In _GD_ParseFragment, a malformed field specification can make _GD_ParseFieldSpec return NULL, but parsing continues without setting GD_E_BAD_DIRFILE, allowing later encoding-support processing to access freed heap memory. Triggering requires a consuming application to process attacker-controlled Dirfile data; exploitation can crash that process or execute code with its privileges.
The record
- CVE
- CVE-2021-20204
- Published
- May 6, 2021
- Updated
- Oct 17, 2024
- Vendor
- GetData Project
- Product
- GetData
- Classifications
- CWE-119
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 6, 2021CVE publishedPublication date reported by the CVE source.
- Oct 17, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=v0.10.0
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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