PT-2021-24116 · Unknown+1 · Tmate-Ssh-Server+1

Matthias Gerstner · Published 2021-12-07 · Updated 2022-05-03 · CVE-2021-44512

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: tmate-ssh-server version 2.3.0

Description: The issue is related to world-writable permissions on the /tmp/tmate/sessions directory, allowing a local attacker to compromise session handling integrity or obtain a read-write session ID from a read-only session symlink in this directory.

Recommendations: For tmate-ssh-server version 2.3.0, consider changing the permissions of the /tmp/tmate/sessions directory to prevent world-writable access as a temporary workaround until a patch is available. Restrict access to this directory to minimize the risk of exploitation.

Fix

Incorrect Permission

Weakness Enumeration

CWE-732

Related Identifiers

CVE-2021-44512

Affected Products

Debian

Tmate-Ssh-Server

References · 11

• https://github.com/tmate-io/tmate-ssh-server/commit/1c020d1f5ca462f5b150b46a027aaa1bbe3c9596 · Patch
• https://ubuntu.com/security/CVE-2021-44512 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-44512 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-44512 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-44512 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-44512 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-44512 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-44512 · Security Note
• https://bugzilla.suse.com/show_bug.cgi?id=1189388 · Note
• https://t.me/cvenotify/24313 · Telegram Post
• https://openwall.com/lists/oss-security/2021/12/06/2 · Note