Service hang via backtracking image-data regular expression
Published Mar 9, 2021 · Updated Sep 17, 2024
Regular expression denial of service in Parallax jsPDF before 2.3.1 allows remote attackers to hang PDF processing via crafted image data. In src/modules/addimage.js, addImage parses the data-URL header with a repeated charset capture whose overlapping matches trigger excessive regular-expression backtracking. Exploitation requires a consuming application to pass attacker-controlled image input to addImage; the resulting CPU exhaustion stalls that application's PDF-processing path without reported data access or modification.
Summary
What happened
Regular expression denial of service in Parallax jsPDF before 2.3.1 allows remote attackers to hang PDF processing via crafted image data. In src/modules/addimage.js, addImage parses the data-URL header with a repeated charset capture whose overlapping matches trigger excessive regular-expression backtracking. Exploitation requires a consuming application to pass attacker-controlled image input to addImage; the resulting CPU exhaustion stalls that application's PDF-processing path without reported data access or modification.
The record
- CVE
- CVE-2021-23353
- Published
- Mar 9, 2021
- Updated
- Sep 17, 2024
- Vendor
- Parallax
- Product
- jsPDF
- Classifications
- CWE-400, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 9, 2021CVE publishedPublication date reported by the CVE source.
- Sep 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <2.3.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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