7.8

CVE-2012-0055: canonical ubuntu_linux Missing Authorization

CVSS: 7.8v3.1HighModified
Published 19-02-2020Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2012-0055 is a high (CVSS 7.8) Missing Authorization vulnerability in canonical ubuntu_linux. EPSS estimates a 1.24% chance of exploitation in the next 30 days, higher than 68.7% of scored vulnerabilities. 3 public exploits are recorded.

Overall risk
41/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
1.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits3reference, exploit-database

Timeline

  1. 19-02-2020
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

OverlayFS in the Linux kernel before 3.0.0-16.28, as used in Ubuntu 10.0.4 LTS and 11.10, is missing inode security checks which could allow attackers to bypass security restrictions and perform unauthorized actions.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.24%

Chance of exploitation in the next 30 days

Percentile

69%

Versus all other CVEs

30-day change

0.00 pp

From 1.24% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

3 found
  • referenceUnverified

    Exploit Reference (openwall.com)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (bugs.launchpad.net)

    Maturity: unknown

  • exploit-databaselocallinuxVerified

    OverlayFS inode Security Checks - 'inode.c' Local Security Bypass

    Maturity: weaponized

Weaknesses

CWE · root cause

Affected systems

Canonical1 product
Linux1 product
Linux kernel1 product
  • overlayfs< 3.0.0-16.28 | as used in Ubuntu 10.0.4 LTS and 11.10

3 vendors · 3 products

References

7 links