8.1

CVE-2018-7711: debian debian_linux

CVSS: 8.1v3.0HighModified
AliasesUBUNTU-CVE-2018-7711DEBIAN-CVE-2018-7711DLA-1314-1
Published 05-03-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-7711 is a high (CVSS 8.1) vulnerability in debian debian_linux. EPSS estimates a 1.19% chance of exploitation in the next 30 days, higher than 67.6% of scored vulnerabilities.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.0 (NVD)
EPSS score
1.19%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-03-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values in the signature validation utilities, allowing an attacker to get invalid signatures accepted as valid by forcing an error during validation. This occurs because of a dependency on PHP functionality that interprets a -1 error code as a true boolean value.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.19%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

+0.04 pp

From 1.14% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.19%

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

Debian2 products
  • simplesamlphp< 1.9.2-1+deb7u4 | < 1.15.4-1
  • debian_linuxEOL7.0
Simplesamlphp2 products
Ubuntu1 product
  • simplesamlphpAll versions (No fix recorded)

3 vendors · 5 products

References

6 links