8.1

CVE-2017-18122: debian debian_linux

CVSS: 8.1v3.0HighModified
AliasesUBUNTU-CVE-2017-18122DEBIAN-CVE-2017-18122
Published 02-02-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2017-18122 is a high (CVSS 8.1) vulnerability in debian debian_linux. EPSS estimates a 1.09% chance of exploitation in the next 30 days, higher than 65.1% 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
1.09%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

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

A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. A SimpleSAMLphp Service Provider using SAML 1.1 will regard as valid any unsigned SAML response containing more than one signed assertion, provided that the signature of at least one of the assertions is valid. Attributes contained in all the assertions received will be merged and the entityID of the first assertion received will be used, allowing an attacker to impersonate any user of any IdP given an assertion signed by the targeted IdP.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.09%

Chance of exploitation in the next 30 days

Percentile

65%

Versus all other CVEs

30-day change

+0.04 pp

From 1.05% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.09%

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

3 vendors · 4 products

References

7 links