CVE-2026-32147

Katalog CVE

CVSS 4.3 · Medium EPSS 0,42%

Kerentanan Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') pada erlang/otp, erlang/ssh. Skor CVSS 3.1 4.3 (Medium) menurut NVD.

Deskripsi (NVD)

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP ssh (ssh_sftpd module) allows an authenticated SFTP user to modify file attributes outside the configured chroot directory. The SFTP daemon (ssh_sftpd) stores the raw, user-supplied path in file handles instead of the chroot-resolved path. When SSH_FXP_FSETSTAT is issued on such a handle, file attributes (permissions, ownership, timestamps) are modified on the real filesystem path, bypassing the root directory boundary entirely. Any authenticated SFTP user on a server configured with the root option can modify file attributes of files outside the intended chroot boundary. The prerequisite is that a target file must exist on the real filesystem at the same relative path. Note that this vulnerability only allows modification of file attributes; file contents cannot be read or altered through this attack vector. If the SSH daemon runs as root, this enables direct privilege escalation: an attacker can set the setuid bit on any binary, change ownership of sensitive files, or make system configuration world-writable. This vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl and program routines ssh_sftpd:do_open/4 and ssh_sftpd:handle_op/4. This issue affects OTP from OTP 17.0 before OTP 28.4.3, OTP 27.3.4.11 and OTP 26.2.5.20, corresponding to ssh from 3.0.1 before 5.5.3, 5.2.11.7 and 5.1.4.15.

Rincian

Terbit di NVD

21 April 2026

Terakhir diubah

24 Juli 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

EPSS (30 hari)

0,42% peluang dieksploitasi; lebih tinggi dari 34,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://cna.erlef.org/cves/CVE-2026-32147.html advisory vendor
• https://github.com/erlang/otp/security/advisories/GHSA-28jg-mw9x-hpm5 advisory vendor
• https://github.com/erlang/otp/commit/28c5d5a6c5f873dc701b597276271763e7d1c004 patch
• https://osv.dev/vulnerability/EEF-CVE-2026-32147 advisory pihak ketiga
• https://www.erlang.org/doc/system/versions.html#order-of-versions product