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CVE-2023-1672

Published: 11 July 2023

A race condition exists in the Tang server functionality for key generation and key rotation. This flaw results in a small time window where Tang private keys become readable by other processes on the same host.

Notes

AuthorNote
alexmurray
For tang 6 and 7 in bionic and focal respectively, the code
from src/keys.c and src/tangd-rotate-keys.in is not present, however there
is an equivalent src/tangd-keygen script which looks like it needs to be
updated to set the umask correctly

Priority

Medium

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package Release Status
tang
Launchpad, Ubuntu, Debian
bionic
Released (6-1ubuntu0.1~esm1)
Available with Ubuntu Pro
focal
Released (7-1ubuntu0.2)
jammy
Released (11-1ubuntu0.1)
kinetic Ignored
(end of life, was needed)
lunar
Released (11-2ubuntu0.1)
mantic Not vulnerable
(14-2)
trusty Ignored
(end of standard support)
upstream Needs triage

xenial Ignored
(end of standard support)
Patches:
upstream: https://github.com/latchset/tang/commit/8dbbed10870378f1b2c3cf3df2ea7edca7617096

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Adjacent
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N