PT-2021-23839 · Libports+1 · Libports+1

Sergey Bugaev · Published 2021-11-07 · Updated 2021-11-09 · CVE-2021-43412

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions GNU Hurd versions prior to 0.9 20210404-9

Description An issue in libports allows it to accept fake notification messages from any client on any port. This can lead to a port use-after-free situation, which can be exploited for local privilege escalation to gain full root access.

Recommendations For versions prior to 0.9 20210404-9, update to version 0.9 20210404-9 or later to resolve the issue.

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2021-43412

Affected Products

Gnu Hurd

Libports

References · 5

• 🔥 https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html · Exploit
• 🔥 https://mail-archive.com/[e-mail]/msg32116.html · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-43412 · Security Note
• https://osv.dev/vulnerability/CVE-2021-43412 · Vendor Advisory
• https://mail-archive.com/bug-hurd%40gnu.org/msg32116.html · Note