CVE-2016-6581

HIGH Year: 2016
CVSS v3 Score
7.5
High
CVSS v2 Score
7.8
High
Weakness Type
CWE-399
View all →

Vulnerability Description

A HTTP/2 implementation built using any version of the Python HPACK library between v1.0.0 and v2.2.0 could be targeted for a denial of service attack, specifically a so-called "HPACK Bomb" attack. This attack occurs when an attacker inserts a header field that is exactly the size of the HPACK dynamic header table into the dynamic header table. The attacker can then send a header block that is simply repeated requests to expand that field in the dynamic table. This can lead to a gigantic compression ratio of 4,096 or better, meaning that 16kB of data can decompress to 64MB of data on the target machine.

Related Vulnerabilities

CVE-2004-2779

HIGH
CVSS:7.5(High)

id3_utf16_deserialize() in utf16.c in libid3tag through 0.15.1b misparses ID3v2 tags encoded in UTF-16 with an odd number of bytes, triggering an endless loop allocating memory until an OOM condition ...

CWE-3992004

CVE-2006-7229

HIGH
CVSS:7.5(High)

The skge driver 1.5 in Linux kernel 2.6.15 on Ubuntu does not properly use the spin_lock and spin_unlock functions, which allows remote attackers to cause a denial of service (machine crash) via a flo...

CWE-3992006

CVE-2007-0342

HIGH
CVSS:7.5(High)

WebCore in Apple WebKit build 18794 allows remote attackers to cause a denial of service (null dereference and application crash) via a TD element with a large number in the ROWSPAN attribute, as demo...

CWE-3992007

CVE-2009-2541

HIGH
CVSS:7.5(High)

The web browser on the Sony PLAYSTATION 3 (PS3) allows remote attackers to cause a denial of service (memory consumption and console hang) via a large integer value for the length property of a Select...

CWE-3992009

CVE-2011-3280

HIGH
CVSS:7.5(High)

Memory leak in the NAT implementation in Cisco IOS 12.1 through 12.4 and 15.0 through 15.1, and IOS XE 3.1.xSG, allows remote attackers to cause a denial of service (memory consumption or device reloa...

CWE-3992011

CVE-2011-4650

HIGH
CVSS:7.5(High)

Cisco Data Center Network Manager is affected by Excessive Logging During a TCP Flood on Java Ports. If the size of server.log becomes very big because of too much logging by the DCNM server, then the...

CWE-3992011