An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.
N/A
Threat Mapped score: 0.0
Industry: Finiancial
Threat priority: Unclassified
CVE: CVE-2021-32617
C++ library for image metadata has "quadratic complexity" issue with unnecessarily repetitive parsing each time an invalid character is encountered
CVE: CVE-2020-10735
Python has "quadratic complexity" issue when converting string to int with many digits in unexpected bases
CVE: CVE-2020-5243
server allows ReDOS with crafted User-Agent strings, due to overlapping capture groups that cause excessive backtracking.
CVE: CVE-2014-1474
Perl-based email address parser has "quadratic complexity" issue via a string that does not contain a valid address
CVE: CVE-2003-0244
CPU consumption via inputs that cause many hash table collisions.
CVE: CVE-2003-0364
CPU consumption via inputs that cause many hash table collisions.
CVE: CVE-2002-1203
Product performs unnecessary processing before dropping an invalid packet.
CVE: CVE-2001-1501
CPU and memory consumption using many wildcards.
CVE: CVE-2004-2527
Product allows attackers to cause multiple copies of a program to be loaded more quickly than the program can detect that other copies are running, then exit. This type of error should probably have its own category, where teardown takes more time than initialization.
CVE: CVE-2006-6931
Network monitoring system allows remote attackers to cause a denial of service (CPU consumption and detection outage) via crafted network traffic, aka a "backtracking attack."
CVE: CVE-2006-3380
Wiki allows remote attackers to cause a denial of service (CPU consumption) by performing a diff between large, crafted pages that trigger the worst case algorithmic complexity.
CVE: CVE-2006-3379
Wiki allows remote attackers to cause a denial of service (CPU consumption) by performing a diff between large, crafted pages that trigger the worst case algorithmic complexity.
CVE: CVE-2005-2506
OS allows attackers to cause a denial of service (CPU consumption) via crafted Gregorian dates.
CVE: CVE-2005-1792
Memory leak by performing actions faster than the software can clear them.
N/A
N/A
| Phase | Note |
|---|---|
| Architecture and Design | N/A |
| Implementation | N/A |
Intro: This example attempts to check if an input string is a "sentence" [REF-1164].
Body: The regular expression has a vulnerable backtracking clause inside (\w+\s?)*$ which can be triggered to cause a Denial of Service by processing particular phrases. To fix the backtracking problem, backtracking is removed with the ?= portion of the expression which changes it to a lookahead and the \2 which prevents the backtracking. The modified example is:
var test_string = "Bad characters: $@#"; var bad_pattern = /^(\w+\s?)*$/i; var result = test_string.search(bad_pattern);