CVE-2020-8833

Katalog CVE

CVSS 4.7 · Medium EPSS 0,34%

Kerentanan Time-of-check Time-of-use (TOCTOU) Race Condition pada canonical ubuntu linux, apport project apport. Skor CVSS 3.1 4.7 (Medium) menurut NVD.

Deskripsi (NVD)

Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.

Rincian

Terbit di NVD

22 April 2020

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

EPSS (30 hari)

0,34% peluang dieksploitasi; lebih tinggi dari 26,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933 exploit · advisory pihak ketiga
• https://usn.ubuntu.com/4315-1/ advisory pihak ketiga
• https://usn.ubuntu.com/4315-2/ advisory pihak ketiga