7.5

CVE-2019-19234: sudo

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2019-19234DEBIAN-CVE-2019-19234
Published 19-12-2019Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2019-19234 is a high (CVSS 7.5) vulnerability in sudo. EPSS estimates a 3.17% chance of exploitation in the next 30 days, higher than 87.8% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
3.17%
0%100%
Low · +0.34 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
MGASA-2020-0246RHSA-2020:1804

Timeline

  1. 19-12-2019
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

In Sudo through 1.8.29, the fact that a user has been blocked (e.g., by using the ! character in the shadow file instead of a password hash) is not considered, allowing an attacker (who has access to a Runas ALL sudoer account) to impersonate any blocked user. NOTE: The software maintainer believes that this CVE is not valid. Disabling local password authentication for a user is not the same as disabling all access to that user--the user may still be able to login via other means (ssh key, kerberos, etc). Both the Linux shadow(5) and passwd(1) manuals are clear on this. Indeed it is a valid use case to have local accounts that are _only_ accessible via sudo and that cannot be logged into with a password. Sudo 1.8.30 added an optional setting to check the _shell_ of the target user (not the encrypted password!) against the contents of /etc/shells but that is not the same thing as preventing access to users with an invalid password hash

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

3.17%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

+0.34 pp

From 2.83% on 20-09-2026

20-09-202620-10-2026
EPSS score
3.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Debian1 product
  • sudo< 1.8.31-1
Sudo1 product
Ubuntu1 product
  • sudo< 1.8.31-1ubuntu1

3 vendors · 3 products

References

22 links
Show all 22 references