Crash via undersized text terminator check
Published Sep 16, 2021 · Updated Aug 4, 2024
Stack buffer overflow in fig2dev 3.2.7b allows attackers to crash the converter through a crafted Fig file that a victim processes. The read_textobject function subtracts four from an undersized continuation-line length before checking for the \001 terminator, so it reads before the s_temp stack buffer. A victim must invoke fig2dev on the crafted file; the grounded impact is process termination, with no NVD-rated confidentiality or integrity loss.
Summary
What happened
Stack buffer overflow in fig2dev 3.2.7b allows attackers to crash the converter through a crafted Fig file that a victim processes. The read_textobject function subtracts four from an undersized continuation-line length before checking for the \001 terminator, so it reads before the s_temp stack buffer. A victim must invoke fig2dev on the crafted file; the grounded impact is process termination, with no NVD-rated confidentiality or integrity loss.
The record
- CVE
- CVE-2020-21533
- Published
- Sep 16, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 16, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- read_textobject crafted Fig-file reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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