What’s Vulnerable › Vulnerabilities

CVE-2024-7264: ASN.1 date parser overread

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 20.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-07-31 · updated 2026-10-15
• Weakness: CWE-125

Description

libcurl's ASN1 parser code has the `GTime2str()` function, used for parsing an ASN.1 Generalized Time field. If given an syntactically incorrect field, the parser might end up using -1 for the length of the *time fraction*, leading to a `strlen()` getting performed on a pointer to a heap buffer area that is not (purposely) null terminated. This flaw most likely leads to a crash, but can also lead to heap contents getting returned to the application when [CURLINFO_CERTINFO](https://curl.se/libcurl/c/CURLINFO_CERTINFO.html) is used.

Affected products

• curl: from 7.32.0 before 8.9.1 — fixed in 8.9.1

How to fix

Upgrade to a fixed version: curl 8.9.1. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2024/07/31/1
• https://curl.se/docs/CVE-2024-7264.html
• https://curl.se/docs/CVE-2024-7264.json
• https://hackerone.com/reports/2629968
• http://www.openwall.com/lists/oss-security/2024/07/31/1
• https://github.com/curl/curl/commit/27959ecce75cdb2809c0bdb3286e60e08fadb519
• https://security.netapp.com/advisory/ntap-20240828-0008/
• https://security.netapp.com/advisory/ntap-20241025-0006/
• https://security.netapp.com/advisory/ntap-20241025-0010/
• https://cert-portal.siemens.com/productcert/html/ssa-089022.html
• https://cert-portal.siemens.com/productcert/html/ssa-355557.html
• https://cert-portal.siemens.com/productcert/html/ssa-398330.html

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