CVE-2024-21524
CVE-2024-21524 is a high-severity vulnerability in Magiclen Stringbuilder with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: High (CVSS 3.x base score 8.2)
- EPSS exploit prediction: 1% (53rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2024-2343
- Weakness: CWE-125
- Affected product: Magiclen Stringbuilder
- Published:
- Last modified:
Description
All versions of the package node-stringbuilder are vulnerable to Out-of-bounds Read due to incorrect memory length calculation, by calling ToBuffer, ToString, or CharAt on a StringBuilder object with a non-empty string value input. It's possible to return previously allocated memory, for example, by providing negative indexes, leading to an Information Disclosure.
Frequently asked questions
- What is CVE-2024-21524?
- All versions of the package node-stringbuilder are vulnerable to Out-of-bounds Read due to incorrect memory length calculation, by calling ToBuffer, ToString, or CharAt on a StringBuilder object with a non-empty string value input. It's possible to return previously allocated memory, for example, by providing negative indexes, leading to an Information Disclosure.
- How severe is CVE-2024-21524?
- CVE-2024-21524 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability high.
- Is CVE-2024-21524 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2024-21524?
- CVE-2024-21524 affects Magiclen Stringbuilder. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2024-21524?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2024-21524 have an EU (EUVD) identifier?
- Yes. CVE-2024-21524 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2343.
- When was CVE-2024-21524 published?
- CVE-2024-21524 was published on 2024-07-10 and last updated on 2026-06-17.
References
- https://gist.github.com/dellalibera/0bb022811224f81d998fa61c3175ee67
- https://github.com/magiclen/node-stringbuilder/blob/5c2797d3d6bf8cb6d10fe1e077609cef9a5a7de0/src/node-stringbuilder.c%23L1281
- https://security.snyk.io/vuln/SNYK-JS-NODESTRINGBUILDER-6421617
Affected products (1)
- cpe:2.3:a:magiclen:stringbuilder:*:*:*:*:*:node.js:*:*
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