9.8

CVE-2018-6521: debian debian_linux

CVSS: 9.8v3.0CriticalModified
AliasesUBUNTU-CVE-2018-6521DEBIAN-CVE-2018-6521
Published 02-02-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-6521 is a critical (CVSS 9.8) vulnerability in debian debian_linux. EPSS estimates a 3.05% chance of exploitation in the next 30 days, higher than 87.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.0 (NVD)
EPSS score
3.05%
0%100%
Low · +0.28 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 2
DLA-1273-1DSA-4127-1

Timeline

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

Description

The sqlauth module in SimpleSAMLphp before 1.15.2 relies on the MySQL utf8 charset, which truncates queries upon encountering four-byte characters. There might be a scenario in which this allows remote attackers to bypass intended access restrictions.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

3.05%

Chance of exploitation in the next 30 days

Percentile

87%

Versus all other CVEs

30-day change

+0.28 pp

From 2.77% on 21-09-2026

21-09-202621-10-2026
EPSS score
3.05%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (lists.debian.org)

    Maturity: unknown

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Debian2 products
Simplesamlphp1 product
Ubuntu1 product
  • simplesamlphpAll versions (No fix recorded)

3 vendors · 4 products

References

6 links