CVE-2016-6817

HIGH

7.5

CVSS Score

Published: August 10, 2017 at 10:00 PM UTC

Updated: June 17, 2026 at 12:51 AM UTC

1 product affected across 1 vendorTomcat

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Severity

HIGH7.5

Exploit prediction

EPSS 7%

SSVC

No known exploit

Description

The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tomcat · Apache

95%

8.5.0 ≤ v ≤ 8.5.69.0.0.M1 ≤ v ≤ 9.0.0.M118.5.0 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

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (8)

VDB Entryx_refsource_BIDThird Party Advisory

Source: [email protected]

http://www.securityfocus.com/bid/94462

VDB Entryx_refsource_SECTRACKThird Party Advisory

Source: [email protected]

http://www.securitytracker.com/id/1037330

Mailing Listx_refsource_MLIST

Source: [email protected]

https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E

Mailing Listx_refsource_MLIST

Source: [email protected]

https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E

Mailing Listx_refsource_MLIST

Source: [email protected]

https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E

Mailing Listx_refsource_MLIST

Source: [email protected]

https://lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a75e32a%40%3Cannounce.tomcat.apache.org%3E

Mailing Listx_refsource_MLIST

Source: [email protected]

https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E

x_refsource_CONFIRM

Source: [email protected]

https://security.netapp.com/advisory/ntap-20180607-0001/

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-119CWE-835

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