CVE-2021-31618

Katalog CVE

CVSS 7.5 · High EPSS 51,5%

Kerentanan NULL Pointer Dereference pada apache http server, fedoraproject fedora +4 lainnya. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

Apache HTTP Server protocol handler for the HTTP/2 protocol checks received request headers against the size limitations as configured for the server and used for the HTTP/1 protocol as well. On violation of these restrictions and HTTP response is sent to the client with a status code indicating why the request was rejected. This rejection response was not fully initialised in the HTTP/2 protocol handler if the offending header was the very first one received or appeared in a a footer. This led to a NULL pointer dereference on initialised memory, crashing reliably the child process. Since such a triggering HTTP/2 request is easy to craft and submit, this can be exploited to DoS the server. This issue affected mod_http2 1.15.17 and Apache HTTP Server version 2.4.47 only. Apache HTTP Server 2.4.47 was never released.

Rincian

Terbit di NVD

15 Juni 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-476: NULL Pointer Dereference

EPSS (30 hari)

51,5% peluang dieksploitasi; lebih tinggi dari 98,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• http://httpd.apache.org/security/vulnerabilities_24.html release notes · advisory vendor
• https://www.oracle.com/security-alerts/cpuoct2021.html patch · advisory pihak ketiga
• http://www.openwall.com/lists/oss-security/2021/06/10/9 mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2021/07/msg00006.html mailing list · advisory pihak ketiga
• https://seclists.org/oss-sec/2021/q2/206 mailing list · advisory pihak ketiga
• https://security.gentoo.org/glsa/202107-38 advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20210727-0008/ advisory pihak ketiga
• https://www.debian.org/security/2021/dsa-4937 advisory pihak ketiga
• http://www.openwall.com/lists/oss-security/2024/03/13/2
• https://lists.apache.org/thread.html/r14b66ef0f4f569fd515a3f96cd4eb58bd9a8ff525cc326bb0359664f%40%3Ccvs.httpd....
• https://lists.apache.org/thread.html/r783b6558abf3305b17ea462bed4bd66d82866438999bf38cef6d11d1%40%3Ccvs.httpd....
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2NKJ3ZA3FTSZ2...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A73QJ4HPUMU26...