8.6

CVE-2016-4553: canonical ubuntu_linux

CVSS: 8.6v3.0HighModified
AliasesUBUNTU-CVE-2016-4553
Published 10-05-2016Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2016-4553 is a high (CVSS 8.6) vulnerability in canonical ubuntu_linux. EPSS estimates a 79.97% chance of exploitation in the next 30 days, higher than 99.6% of scored vulnerabilities.

Overall risk
50/100
0100
High · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.0 (NVD)
EPSS score
79.97%
0%100%
Critical · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 4
DSA-3625-1MGASA-2016-0171OPENSUSE-SU-2024:11403-1RHSA-2016:1139RHSA-2016:1140SUSE-SU-2016:2008-1

Timeline

  1. 10-05-2016
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

client_side.cc in Squid before 3.5.18 and 4.x before 4.0.10 does not properly ignore the Host header when absolute-URI is provided, which allows remote attackers to conduct cache-poisoning attacks via an HTTP request.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

79.97%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

0.00 pp

From 79.97% on 18-09-2026

18-09-202618-10-2026
EPSS score
79.97%

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
Oracle1 product
Squid-cache1 product
  • squidEOL≤ 3.5.17 | 4.0.1 | 4.0.2 | 4.0.3 | 4.0.4 | 4.0.5 | 4.0.6 | 4.0.7 | 4.0.8 | 4.0.9
Ubuntu1 product
  • squid3< 3.3.8-1ubuntu6.8 | < 3.5.12-1ubuntu7.2

4 vendors · 4 products

References

16 links
Show all 16 references