7.1

CVE-2016-4449: canonical ubuntu_linux Improper Input Validation

CVSS: 7.1v3.0HighModified
AliasesUBUNTU-CVE-2016-4449DEBIAN-CVE-2016-4449
Published 09-06-2016Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2016-4449 is a high (CVSS 7.1) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 1.66% chance of exploitation in the next 30 days, higher than 76.3% of scored vulnerabilities.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.0 (NVD)
EPSS score
1.66%
0%100%
Low · 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 7 · Related 3
DLA-503-1DSA-3593-1MGASA-2016-0263RHSA-2016:1292SUSE-SU-2016:1538-1SUSE-SU-2016:1604-1

Timeline

  1. 09-06-2016
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

XML external entity (XXE) vulnerability in the xmlStringLenDecodeEntities function in parser.c in libxml2 before 2.9.4, when not in validating mode, allows context-dependent attackers to read arbitrary files or cause a denial of service (resource consumption) via unspecified vectors.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.66%

Chance of exploitation in the next 30 days

Percentile

76%

Versus all other CVEs

30-day change

0.00 pp

From 1.66% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.66%

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
Canonical1 product
Ubuntu1 product
  • libxml2< 2.9.1+dfsg1-3ubuntu4.8 | < 2.9.3+dfsg1-1ubuntu0.1
Xmlsoft1 product

4 vendors · 5 products

References

34 links
Show all 34 references