7.5

CVE-2018-7549: canonical ubuntu_linux Improper Input Validation

CVSS: 7.5v3.0HighModified
AliasesUBUNTU-CVE-2018-7549DEBIAN-CVE-2018-7549
Published 27-02-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-7549 is a high (CVSS 7.5) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 2.59% chance of exploitation in the next 30 days, higher than 85.1% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
2.59%
0%100%
Low · +0.13 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 3
MGASA-2018-0168RHSA-2018:3073SUSE-SU-2018:1072-1SUSE-SU-2022:14910-1USN-3593-1

Timeline

  1. 27-02-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

2.59%

Chance of exploitation in the next 30 days

Percentile

85%

Versus all other CVEs

30-day change

+0.13 pp

From 2.46% on 21-09-2026

21-09-202621-10-2026
EPSS score
2.59%

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

Redhat3 products
Canonical1 product
Debian1 product
  • zsh< 5.5-1
Ubuntu1 product
  • zsh< 5.0.2-3ubuntu6.1 | < 5.1.1-1ubuntu2.1
Zsh1 product

5 vendors · 7 products

References

8 links