7.1

CVE-2016-6816: apache software foundation apache tomcat Improper Input Validation

Modified
AliasesUBUNTU-CVE-2016-6816GHSA-jc7p-5r39-9477
Published 20-03-2017Last modified 14-11-2024

Vulnerability summary

CVE-2016-6816 is a high (CVSS 7.1) Improper Input Validation vulnerability in apache software foundation apache tomcat. EPSS estimates a 39.63% chance of exploitation in the next 30 days, higher than 98.6% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Prioritisepublic exploit

Public exploit (exploit-database, 04-04-2017)

Source freshness unavailable

How is this decided?
CVSS score
7.1/10
010
High · v3.0 (NVD)
EPSS score
39.63%
0%100%
High · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1exploit-database

Advisory lineage

Upstream 0 · Downstream 19 · Related 6
DLA-728-1DLA-729-1DSA-3738-1DSA-3739-1MGASA-2016-0417RHSA-2017:0244

Timeline

  1. 20-03-2017
    PublishedVulnerability first disclosed.
  2. 14-11-2024
    Last modifiedVulnerability information updated.

Description

The code in Apache Tomcat 9.0.0.M1 to 9.0.0.M11, 8.5.0 to 8.5.6, 8.0.0.RC1 to 8.0.38, 7.0.0 to 7.0.72, and 6.0.0 to 6.0.47 that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack and/or obtain sensitive information from requests other then their own.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

39.63%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

No change 0.00 pp

From 39.63% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • exploit-databaseremotemultipleUnverified

    Apache Tomcat 6/7/8/9 - Information Disclosure

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu3 products
  • tomcat6All versions (No fix recorded) | < 6.0.45+dfsg-1ubuntu0.1
  • tomcat7< 7.0.52-1ubuntu0.8 | < 7.0.68-1ubuntu0.3
  • tomcat8< 8.0.32-1ubuntu1.3
Apache1 product
  • tomcatEOL6.0.0 | 6.0.1 | 6.0.2 | 6.0.3 | 6.0.4 | 6.0.5 | 6.0.6 | 6.0.7 | 6.0.8 | 6.0.9 | 6.0.10 | 6.0.11 | 6.0.12 | 6.0.13 | 6.0.14 | 6.0.15 | 6.0.16 | 6.0.17 | 6.0.18 | 6.0.19 | 6.0.20 | 6.0.21 | 6.0.22 | 6.0.23 | 6.0.24 | 6.0.25 | 6.0.26 | 6.0.27 | 6.0.28 | 6.0.29 | 6.0.30 | 6.0.31 | 6.0.32 | 6.0.33 | 6.0.34 | 6.0.35 | 6.0.36 | 6.0.37 | 6.0.38 | 6.0.39 | 6.0.40 | 6.0.41 | 6.0.42 | 6.0.43 | 6.0.44 | 6.0.45 | 6.0.46 | 6.0.47 | 7.0.0 | 7.0.1 | 7.0.2 | 7.0.3 | 7.0.4 | 7.0.5 | 7.0.6 | 7.0.7 | 7.0.8 | 7.0.9 | 7.0.10 | 7.0.11 | 7.0.12 | 7.0.13 | 7.0.14 | 7.0.15 | 7.0.16 | 7.0.17 | 7.0.18 | 7.0.19 | 7.0.20 | 7.0.21 | 7.0.22 | 7.0.23 | 7.0.24 | 7.0.25 | 7.0.26 | 7.0.27 | 7.0.28 | 7.0.29 | 7.0.30 | 7.0.31 | 7.0.32 | 7.0.33 | 7.0.34 | 7.0.35 | 7.0.36 | 7.0.37 | 7.0.38 | 7.0.39 | 7.0.40 | 7.0.41 | 7.0.42 | 7.0.43 | 7.0.44 | 7.0.45 | 7.0.46 | 7.0.47 | 7.0.48 | 7.0.49 | 7.0.50 | 7.0.51 | 7.0.52 | 7.0.53 | 7.0.54 | 7.0.55 | 7.0.56 | 7.0.57 | 7.0.58 | 7.0.59 | 7.0.60 | 7.0.61 | 7.0.62 | 7.0.63 | 7.0.64 | 7.0.65 | 7.0.66 | 7.0.67 | 7.0.68 | 7.0.69 | 7.0.70 | 7.0.71 | 7.0.72 | 8.0.0 | 8.0.1 | 8.0.2 | 8.0.3 | 8.0.4 | 8.0.5 | 8.0.6 | 8.0.7 | 8.0.8 | 8.0.9 | 8.0.10 | 8.0.11 | 8.0.12 | 8.0.13 | 8.0.14 | 8.0.15 | 8.0.16 | 8.0.17 | 8.0.18 | 8.0.19 | 8.0.20 | 8.0.21 | 8.0.22 | 8.0.23 | 8.0.24 | 8.0.25 | 8.0.26 | 8.0.27 | 8.0.28 | 8.0.29 | 8.0.30 | 8.0.31 | 8.0.32 | 8.0.33 | 8.0.34 | 8.0.35 | 8.0.36 | 8.0.37 | 8.0.38 | 8.5.0 | 8.5.1 | 8.5.2 | 8.5.3 | 8.5.4 | 8.5.5 | 8.5.6 | 9.0.0:milestone1 | 9.0.0:milestone10 | 9.0.0:milestone11 | 9.0.0:milestone2 | 9.0.0:milestone3 | 9.0.0:milestone4 | 9.0.0:milestone5 | 9.0.0:milestone6 | 9.0.0:milestone7 | 9.0.0:milestone8 | 9.0.0:milestone9
Apache software foundation1 product
  • apache tomcat9.0.0.M1 to 9.0.0.M11 | 8.5.0 to 8.5.6 | 8.0.0.RC1 to 8.0.38 | 7.0.0 to 7.0.72 | 6.0.0 to 6.0.47 | Earlier, unsupported versions may also be affected.
Org.apache.tomcat1 product
  • tomcat-coyote≥ 9.0.0.M1, < 9.0.0.M12 | ≥ 8.5.0, < 8.5.8 | ≥ 8.0.0RC1, < 8.0.39 | ≥ 7.0.0, < 7.0.73 | ≥ 6.0.0, < 6.0.48

4 vendors · 6 products

References

70 links
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