CVE-2021-22901

Katalog CVE

CVSS 8.1 · High EPSS 60,1%

Kerentanan Use After Free pada haxx curl, oracle communications cloud native core binding support function +24 lainnya. Skor CVSS 3.1 8.1 (High) menurut NVD.

Deskripsi (NVD)

curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL, it stores pointers to the transfer in-memory object for later retrieval when a session ticket arrives. If the connection is used by multiple transfers (like with a reused HTTP/1.1 connection or multiplexed HTTP/2 connection) that first transfer object might be freed before the new session is established on that connection and then the function will access a memory buffer that might be freed. When using that memory, libcurl might even call a function pointer in the object, making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct place in memory.

Rincian

Terbit di NVD

11 Juni 2021

Terakhir diubah

8 Oktober 2026

Status NVD

Modified

CVSS 3.1

8.1 (High), sumber NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-416: Use After Free

EPSS (30 hari)

60,1% peluang dieksploitasi; lebih tinggi dari 99,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://curl.se/docs/CVE-2021-22901.html exploit · patch · advisory vendor
• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf patch · advisory pihak ketiga
• https://github.com/curl/curl/commit/7f4a9a9b2a49547eae24d2e19bc5c346e9026479 patch · advisory pihak ketiga
• https://www.oracle.com//security-alerts/cpujul2021.html patch · advisory pihak ketiga
• https://www.oracle.com/security-alerts/cpuapr2022.html patch · advisory pihak ketiga
• https://www.oracle.com/security-alerts/cpujan2022.html patch · advisory pihak ketiga
• https://cert-portal.siemens.com/productcert/pdf/ssa-732250.pdf advisory pihak ketiga
• https://hackerone.com/reports/1180380 exploit · issue tracking · advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20210723-0001/ advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20210727-0007/ advisory pihak ketiga