9.8

CVE-2018-0502: canonical ubuntu_linux Improper Input Validation

CVSS: 9.8v3.0CriticalModified
AliasesUBUNTU-CVE-2018-0502DEBIAN-CVE-2018-0502
Published 05-09-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-0502 is a critical (CVSS 9.8) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 2.49% chance of exploitation in the next 30 days, higher than 84.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.0 (NVD)
EPSS score
2.49%
0%100%
Low · +0.21 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 5
DLA-2470-1OPENSUSE-SU-2024:11543-1SUSE-SU-2018:2686-1SUSE-SU-2022:0161-1SUSE-SU-2022:14910-1USN-3764-1

Timeline

  1. 05-09-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in zsh before 5.6. The beginning of a #! script file was mishandled, potentially leading to an execve call to a program named on the second line.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

2.49%

Chance of exploitation in the next 30 days

Percentile

84%

Versus all other CVEs

30-day change

+0.21 pp

From 2.28% on 21-09-2026

21-09-202621-10-2026
EPSS score
2.49%

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

Affected systems

Canonical1 product
Debian1 product
  • zsh< 5.6-1
Ubuntu1 product
  • zsh< 5.0.2-3ubuntu6.3 | < 5.1.1-1ubuntu2.3 | < 5.4.2-3ubuntu3.1
Zsh1 product

4 vendors · 4 products

References

10 links