CVE-2021-3738

Katalog CVE

CVSS 8.8 · High EPSS 2,0%

Kerentanan Use After Free pada samba. Skor CVSS 3.1 8.8 (High) menurut NVD.

Deskripsi (NVD)

In DCE/RPC it is possible to share the handles (cookies for resource state) between multiple connections via a mechanism called 'association groups'. These handles can reference connections to our sam.ldb database. However while the database was correctly shared, the user credentials state was only pointed at, and when one connection within that association group ended, the database would be left pointing at an invalid 'struct session_info'. The most likely outcome here is a crash, but it is possible that the use-after-free could instead allow different user state to be pointed at and this might allow more privileged access.

Rincian

Terbit di NVD

2 Maret 2022

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-416: Use After Free

EPSS (30 hari)

2,0% peluang dieksploitasi; lebih tinggi dari 80,7% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugzilla.samba.org/show_bug.cgi?id=14468 issue tracking · patch · advisory vendor
• https://www.samba.org/samba/security/CVE-2021-3738.html advisory vendor
• https://bugzilla.redhat.com/show_bug.cgi?id=2021726 issue tracking · advisory pihak ketiga
• https://security.gentoo.org/glsa/202309-06