Common Weakness Enumeration
CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5531 vulnerabilities reference this CWE, most recent first.
CVE-2021-41229 (GCVE-0-2021-41229)
Vulnerability from cvelistv5 – Published: 2021-11-12 00:00 – Updated: 2025-11-04 16:09
VLAI
EPSS
VEX
Title
Memory leak in BlueZ
Summary
BlueZ is a Bluetooth protocol stack for Linux. In affected versions a vulnerability exists in sdp_cstate_alloc_buf which allocates memory which will always be hung in the singly linked list of cstates and will not be freed. This will cause a memory leak over time. The data can be a very large object, which can be caused by an attacker continuously sending sdp packets and this may cause the service of the target device to crash.
Severity
4.3 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
5 references
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CVE-2021-41186 (GCVE-0-2021-41186)
Vulnerability from cvelistv5 – Published: 2021-10-29 13:40 – Updated: 2024-08-04 03:08
VLAI
EPSS
VEX
Title
ReDoS vulnerability in parser_apache2
Summary
Fluentd collects events from various data sources and writes them to files to help unify logging infrastructure. The parser_apache2 plugin in Fluentd v0.14.14 to v1.14.1 suffers from a regular expression denial of service (ReDoS) vulnerability. A broken apache log with a certain pattern of string can spend too much time in a regular expression, resulting in the potential for a DoS attack. This issue is patched in version 1.14.2 There are two workarounds available. Either don't use parser_apache2 for parsing logs (which cannot guarantee generated by Apache), or put patched version of parser_apache2.rb into /etc/fluent/plugin directory (or any other directories specified by the environment variable `FLUENT_PLUGIN` or `--plugin` option of fluentd).
Severity
5.9 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
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|---|---|
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CVE-2021-41168 (GCVE-0-2021-41168)
Vulnerability from cvelistv5 – Published: 2021-10-21 20:10 – Updated: 2024-08-04 02:59
VLAI
EPSS
VEX
Title
Hash-Collision Denial-of-Service Vulnerability in snudown
Summary
Snudown is a reddit-specific fork of the Sundown Markdown parser used by GitHub, with Python integration added. In affected versions snudown was found to be vulnerable to denial of service attacks to its reference table implementation. References written in markdown ` [reference_name]: https://www.example.com` are inserted into a hash table which was found to have a weak hash function, meaning that an attacker can reliably generate a large number of collisions for it. This makes the hash table vulnerable to a hash-collision DoS attack, a type of algorithmic complexity attack. Further the hash table allowed for duplicate entries resulting in long retrieval times. Proofs of concept and further discussion of the hash collision issue are discussed on the snudown GHSA(https://github.com/reddit/snudown/security/advisories/GHSA-6gvv-9q92-w5f6). Users are advised to update to version 1.7.0.
Severity
6.5 (Medium)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/reddit/snudown/security/adviso… | x_refsource_CONFIRM |
| https://github.com/reddit/snudown/commit/1ac2c130… | x_refsource_MISC |
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CVE-2021-41167 (GCVE-0-2021-41167)
Vulnerability from cvelistv5 – Published: 2021-10-20 18:25 – Updated: 2024-08-04 02:59
VLAI
EPSS
VEX
Title
Unlimited requests in modern-async
Summary
modern-async is an open source JavaScript tooling library for asynchronous operations using async/await and promises. In affected versions a bug affecting two of the functions in this library: forEachSeries and forEachLimit. They should limit the concurrency of some actions but, in practice, they don't. Any code calling these functions will be written thinking they would limit the concurrency but they won't. This could lead to potential security issues in other projects. The problem has been patched in 1.0.4. There is no workaround.
Severity
7.5 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/nicolas-van/modern-async/secur… | x_refsource_CONFIRM |
| https://github.com/nicolas-van/modern-async/issues/5 | x_refsource_MISC |
| https://github.com/nicolas-van/modern-async/commi… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| nicolas-van | modern-async |
Affected:
< 1.0.4
|
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CVE-2021-41145 (GCVE-0-2021-41145)
Vulnerability from cvelistv5 – Published: 2021-10-25 22:05 – Updated: 2024-08-04 02:59
VLAI
EPSS
VEX
Title
FreeSWITCH susceptible to Denial of Service via SIP flooding
Summary
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. FreeSWITCH prior to version 1.10.7 is susceptible to Denial of Service via SIP flooding. When flooding FreeSWITCH with SIP messages, it was observed that after a number of seconds the process was killed by the operating system due to memory exhaustion. By abusing this vulnerability, an attacker is able to crash any FreeSWITCH instance by flooding it with SIP messages, leading to Denial of Service. The attack does not require authentication and can be carried out over UDP, TCP or TLS. This issue was patched in version 1.10.7.
Severity
8.6 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/signalwire/freeswitch/releases… | x_refsource_MISC |
| https://github.com/signalwire/freeswitch/security… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| signalwire | freeswitch |
Affected:
< 1.10.7
|
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CVE-2021-41119 (GCVE-0-2021-41119)
Vulnerability from cvelistv5 – Published: 2022-04-13 18:25 – Updated: 2025-04-22 18:16
VLAI
EPSS
VEX
Title
DoS vulnerabiliity in wire-server json parser
Summary
Wire-server is the system server for the wire back-end services. Releases prior to v2022-03-01 are subject to a denial of service attack via a crafted object causing a hash collision. This collision causes the server to spend at least quadratic time parsing it which can lead to a denial of service for a heavily used server. The issue has been fixed in wire-server 2022-03-01 and is already deployed on all Wire managed services. On premise instances of wire-server need to be updated to 2022-03-01, so that their backends are no longer affected. There are no known workarounds for this issue.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/wireapp/wire-server/security/a… | x_refsource_CONFIRM |
| https://cs-syd.eu/posts/2021-09-11-json-vulnerability | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wireapp | wire-server |
Affected:
< v2022-03-01
|
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CVE-2021-41118 (GCVE-0-2021-41118)
Vulnerability from cvelistv5 – Published: 2021-10-04 18:35 – Updated: 2024-08-04 02:59
VLAI
EPSS
VEX
Title
ReDoS in DynamicPageList3
Summary
The DynamicPageList3 extension is a reporting tool for MediaWiki, listing category members and intersections with various formats and details. In affected versions unsanitised input of regular expression date within the parameters of the DPL parser function, allowed for the possibility of ReDoS (Regex Denial of Service). This has been resolved in version 3.3.6. If you are unable to update you may also set `$wgDplSettings['functionalRichness'] = 0;` or disable DynamicPageList3 to mitigate.
Severity
5.3 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/Universal-Omega/DynamicPageLis… | x_refsource_CONFIRM |
| https://github.com/Universal-Omega/DynamicPageLis… | x_refsource_MISC |
| https://github.com/Universal-Omega/DynamicPageLis… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Universal-Omega | DynamicPageList3 |
Affected:
< 3.3.6
|
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CVE-2021-41115 (GCVE-0-2021-41115)
Vulnerability from cvelistv5 – Published: 2021-10-07 22:20 – Updated: 2024-08-04 02:59
VLAI
EPSS
VEX
Title
Regular expression denial-of-service in Zulip
Summary
Zulip is an open source team chat server. In affected versions Zulip allows organization administrators on a server to configure "linkifiers" that automatically create links from messages that users send, detected via arbitrary regular expressions. Malicious organization administrators could subject the server to a denial-of-service via regular expression complexity attacks; most simply, by configuring a quadratic-time regular expression in a linkifier, and sending messages that exploited it. A regular expression attempted to parse the user-provided regexes to verify that they were safe from ReDoS -- this was both insufficient, as well as _itself_ subject to ReDoS if the organization administrator entered a sufficiently complex invalid regex. Affected users should [upgrade to the just-released Zulip 4.7](https://zulip.readthedocs.io/en/latest/production/upgrade-or-modify.html#upgrading-to-a-release), or [`main`](https://zulip.readthedocs.io/en/latest/production/upgrade-or-modify.html#upgrading-from-a-git-repository).
Severity
4.3 (Medium)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zulip/zulip/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/zulip/zulip/commit/e2d303c1bb5… | x_refsource_MISC |
| https://securitylab.github.com/advisories/GHSL-20… | x_refsource_MISC |
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CVE-2021-40406 (GCVE-0-2021-40406)
Vulnerability from cvelistv5 – Published: 2022-01-28 19:10 – Updated: 2025-04-15 19:21
VLAI
EPSS
VEX
Summary
A denial of service vulnerability exists in the cgiserver.cgi session creation functionality of reolink RLC-410W v3.0.0.136_20121102. A specially-crafted HTTP request can lead to prevent users from logging in. An attacker can send an HTTP request to trigger this vulnerability.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://talosintelligence.com/vulnerability_repor… | x_refsource_MISC |
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CVE-2021-39229 (GCVE-0-2021-39229)
Vulnerability from cvelistv5 – Published: 2021-09-20 21:20 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
Regular expression deinal of service in apprise
Summary
Apprise is an open source library which allows you to send a notification to almost all of the most popular notification services available. In affected versions users who use Apprise granting them access to the IFTTT plugin (which just comes out of the box) are subject to a denial of service attack on an inefficient regular expression. The vulnerable regular expression is [here](https://github.com/caronc/apprise/blob/0007eade20934ddef0aba38b8f1aad980cfff253/apprise/plugins/NotifyIFTTT.py#L356-L359). The problem has been patched in release version 0.9.5.1. Users who are unable to upgrade are advised to remove `apprise/plugins/NotifyIFTTT.py` to eliminate the service.
Severity
7.5 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/caronc/apprise/security/adviso… | x_refsource_CONFIRM |
| https://github.com/caronc/apprise/pull/436 | x_refsource_MISC |
| https://github.com/caronc/apprise/blob/0007eade20… | x_refsource_MISC |
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Mitigation
Architecture and Design
Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place. The login application should be protected against DoS attacks as much as possible. Limiting the database access, perhaps by caching result sets, can help minimize the resources expended. To further limit the potential for a DoS attack, consider tracking the rate of requests received from users and blocking requests that exceed a defined rate threshold.
Mitigation
Architecture and Design
- Mitigation of resource exhaustion attacks requires that the target system either:
- The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
- The second solution is simply difficult to effectively institute -- and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.
- recognizes the attack and denies that user further access for a given amount of time, or
- uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed.
Mitigation
Architecture and Design
Ensure that protocols have specific limits of scale placed on them.
Mitigation
Implementation
Ensure that all failures in resource allocation place the system into a safe posture.
CAPEC-147: XML Ping of the Death
An attacker initiates a resource depletion attack where a large number of small XML messages are delivered at a sufficiently rapid rate to cause a denial of service or crash of the target. Transactions such as repetitive SOAP transactions can deplete resources faster than a simple flooding attack because of the additional resources used by the SOAP protocol and the resources necessary to process SOAP messages. The transactions used are immaterial as long as they cause resource utilization on the target. In other words, this is a normal flooding attack augmented by using messages that will require extra processing on the target.
CAPEC-227: Sustained Client Engagement
An adversary attempts to deny legitimate users access to a resource by continually engaging a specific resource in an attempt to keep the resource tied up as long as possible. The adversary's primary goal is not to crash or flood the target, which would alert defenders; rather it is to repeatedly perform actions or abuse algorithmic flaws such that a given resource is tied up and not available to a legitimate user. By carefully crafting a requests that keep the resource engaged through what is seemingly benign requests, legitimate users are limited or completely denied access to the resource.
CAPEC-492: Regular Expression Exponential Blowup
An adversary may execute an attack on a program that uses a poor Regular Expression(Regex) implementation by choosing input that results in an extreme situation for the Regex. A typical extreme situation operates at exponential time compared to the input size. This is due to most implementations using a Nondeterministic Finite Automaton(NFA) state machine to be built by the Regex algorithm since NFA allows backtracking and thus more complex regular expressions.