CVE-2024-7264: libcurl Out-of-bounds Read

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.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

Affected Products

Vendor	Product	Versions
haxx	libcurl	7.32.0 — 8.9.1

References

Advisories & Patches

https://curl.se/docs/CVE-2024-7264.html https://curl.se/docs/CVE-2024-7264.json

Exploits

https://hackerone.com/reports/2629968

Other References

http://www.openwall.com/lists/oss-security/2024/07/31/1 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/

Frequently Asked Questions

What is CVE-2024-7264? +

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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2024-7264? +

CVE-2024-7264 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-7264? +

CVE-2024-7264 affects products from haxx, specifically: libcurl. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-7264? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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