PT-2020-4973 · Linux+1 · Linux Kernel+1

Published 2020-04-24 · Updated 2022-10-06 · CVE-2020-29372

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.6.8

Description The issue is related to a race condition between coredump operations and the IORING OP MADVISE implementation in the do madvise function of the Linux kernel. This condition may allow an attacker to cause a denial of service.

Recommendations For versions prior to 5.6.8, update to version 5.6.8 or later to resolve the issue. As a temporary workaround, consider restricting access to the IORING OP MADVISE implementation until a patch is available.

Exploit

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

ALT-PU-2020-1913

ALT-PU-2020-1917

ALT-PU-2020-1928

ALT-PU-2020-1929

ALT-PU-2020-2153

ALT-PU-2020-2164

ALT-PU-2021-1621

ALT-PU-2021-1656

ALT-PU-2021-1739

ALT-PU-2021-1862

ALT-PU-2021-1866

ALT-PU-2021-1870

BDU:2020-05550

CVE-2020-29372

Affected Products

Alt Linux

Linux Kernel

References · 20

• 🔥 https://project-zero.issues.chromium.org/issues/42451131 · Exploit
• 🔥 https://bugs.chromium.org/p/project-zero/issues/detail?id=2029 · Exploit
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.8 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-29372 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0c4d1e176eeb614dc8734fc3ace34292771f11 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-05550 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-29372 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-29372 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-29372 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2020-29372 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-29372 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-29372 · Vendor Advisory
• https://t.me/cibsecurity/16909 · Telegram Post
• https://cxsecurity.com/cveshow/CVE-2020-29372 · Note
• http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html · Note