A use after free vulnerability exists in curl <7.87.0. Curl can be asked to *tunnel* virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://security.netapp.com/advisory/ntap-20230214-0002/ Vendor Advisory
- https://security.netapp.com/advisory/ntap-20230214-0002/ Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.9 · haxx, apple, splunkNVD modified 2026-10-14 19:16
Affected (CPE criteria) 4
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*
References 12
- http://seclists.org/fulldisclosure/2023/Mar/17 Mailing List, Third Party Advisory
- https://hackerone.com/reports/1764858 Exploit, Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202310-12 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230214-0002/ Vendor Advisory
- https://support.apple.com/kb/HT213670 Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Mar/17 Mailing List, Third Party Advisory
- https://hackerone.com/reports/1764858 Exploit, Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202310-12 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230214-0002/ Vendor Advisory
- https://support.apple.com/kb/HT213670 Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-892048.html