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.
5473 vulnerabilities reference this CWE, most recent first.
CVE-2021-21294 (GCVE-0-2021-21294)
Vulnerability from cvelistv5 – Published: 2021-02-02 21:40 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Unbounded connection acceptance in http4s-blaze-server
Summary
Http4s (http4s-blaze-server) is a minimal, idiomatic Scala interface for HTTP services. Http4s before versions 0.21.17, 0.22.0-M2, and 1.0.0-M14 have a vulnerability which can lead to a denial-of-service. Blaze-core, a library underlying http4s-blaze-server, accepts connections unboundedly on its selector pool. This has the net effect of amplifying degradation in services that are unable to handle their current request load, since incoming connections are still accepted and added to an unbounded queue. Each connection allocates a socket handle, which drains a scarce OS resource. This can also confound higher level circuit breakers which work based on detecting failed connections. http4s provides a general "MaxActiveRequests" middleware mechanism for limiting open connections, but it is enforced inside the Blaze accept loop, after the connection is accepted and the socket opened. Thus, the limit only prevents the number of connections which can be simultaneously processed, not the number of connections which can be held open. In 0.21.17, 0.22.0-M2, and 1.0.0-M14, a new "maxConnections" property, with a default value of 1024, has been added to the `BlazeServerBuilder`. Setting the value to a negative number restores unbounded behavior, but is strongly disrecommended. The NIO2 backend does not respect `maxConnections`. Its use is now deprecated in http4s-0.21, and the option is removed altogether starting in http4s-0.22. There are several possible workarounds described in the refrenced GitHub Advisory GHSA-xhv5-w9c5-2r2w.
Severity
7.5 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/http4s/http4s/security/advisor… | x_refsource_CONFIRM |
| https://github.com/http4s/blaze/security/advisori… | x_refsource_MISC |
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CVE-2021-21293 (GCVE-0-2021-21293)
Vulnerability from cvelistv5 – Published: 2021-02-02 21:35 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Unbounded connection acceptance leads to file handle exhaustion
Summary
blaze is a Scala library for building asynchronous pipelines, with a focus on network IO. All servers running blaze-core before version 0.14.15 are affected by a vulnerability in which unbounded connection acceptance leads to file handle exhaustion. Blaze, accepts connections unconditionally on a dedicated thread pool. This has the net effect of amplifying degradation in services that are unable to handle their current request load, since incoming connections are still accepted and added to an unbounded queue. Each connection allocates a socket handle, which drains a scarce OS resource. This can also confound higher level circuit breakers which work based on detecting failed connections. The vast majority of affected users are using it as part of http4s-blaze-server <= 0.21.16. http4s provides a mechanism for limiting open connections, but is enforced inside the Blaze accept loop, after the connection is accepted and the socket opened. Thus, the limit only prevents the number of connections which can be simultaneously processed, not the number of connections which can be held open. The issue is fixed in version 0.14.15 for "NIO1SocketServerGroup". A "maxConnections" parameter is added, with a default value of 512. Concurrent connections beyond this limit are rejected. To run unbounded, which is not recommended, set a negative number. The "NIO2SocketServerGroup" has no such setting and is now deprecated. There are several possible workarounds described in the refrenced GitHub Advisory GHSA-xmw9-q7x9-j5qc.
Severity
7.5 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/http4s/blaze/security/advisori… | x_refsource_CONFIRM |
| https://github.com/http4s/http4s/security/advisor… | x_refsource_MISC |
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CVE-2021-21285 (GCVE-0-2021-21285)
Vulnerability from cvelistv5 – Published: 2021-02-02 17:55 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Docker daemon crash during image pull of malicious image
Summary
In Docker before versions 9.03.15, 20.10.3 there is a vulnerability in which pulling an intentionally malformed Docker image manifest crashes the dockerd daemon. Versions 20.10.3 and 19.03.15 contain patches that prevent the daemon from crashing.
Severity
6.5 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://github.com/moby/moby/security/advisories/… | x_refsource_CONFIRM |
| https://docs.docker.com/engine/release-notes/#20103 | x_refsource_MISC |
| https://github.com/moby/moby/releases/tag/v20.10.3 | x_refsource_MISC |
| https://github.com/moby/moby/releases/tag/v19.03.15 | x_refsource_MISC |
| https://github.com/moby/moby/commit/8d3179546e790… | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021022… | x_refsource_CONFIRM |
| https://www.debian.org/security/2021/dsa-4865 | vendor-advisoryx_refsource_DEBIAN |
| https://security.gentoo.org/glsa/202107-23 | vendor-advisoryx_refsource_GENTOO |
Impacted products
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CVE-2021-21274 (GCVE-0-2021-21274)
Vulnerability from cvelistv5 – Published: 2021-02-26 17:25 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Denial of service attack via .well-known lookups
Summary
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.25.0, a malicious homeserver could redirect requests to their .well-known file to a large file. This can lead to a denial of service attack where homeservers will consume significantly more resources when requesting the .well-known file of a malicious homeserver. This affects any server which accepts federation requests from untrusted servers. Issue is resolved in version 1.25.0. As a workaround the `federation_domain_whitelist` setting can be used to restrict the homeservers communicated with over federation.
Severity
4.3 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/matrix-org/synapse/security/ad… | x_refsource_CONFIRM |
| https://github.com/matrix-org/synapse/releases/ta… | x_refsource_MISC |
| https://github.com/matrix-org/synapse/pull/8950 | x_refsource_MISC |
| https://github.com/matrix-org/synapse/commit/ff5c… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| matrix-org | synapse |
Affected:
>=0.99.0, < 1.25.0
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CVE-2021-21271 (GCVE-0-2021-21271)
Vulnerability from cvelistv5 – Published: 2021-01-26 20:55 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Denial of service in TenderMint Core
Summary
Tendermint Core is an open source Byzantine Fault Tolerant (BFT) middleware that takes a state transition machine - written in any programming language - and securely replicates it on many machines. Tendermint Core v0.34.0 introduced a new way of handling evidence of misbehavior. As part of this, we added a new Timestamp field to Evidence structs. This timestamp would be calculated using the same algorithm that is used when a block is created and proposed. (This algorithm relies on the timestamp of the last commit from this specific block.) In Tendermint Core v0.34.0-v0.34.2, the consensus reactor is responsible for forming DuplicateVoteEvidence whenever double signs are observed. However, the current block is still “in flight” when it is being formed by the consensus reactor. It hasn’t been finalized through network consensus yet. This means that different nodes in the network may observe different “last commits” when assigning a timestamp to DuplicateVoteEvidence. In turn, different nodes could form DuplicateVoteEvidence objects at the same height but with different timestamps. One DuplicateVoteEvidence object (with one timestamp) will then eventually get finalized in the block, but this means that any DuplicateVoteEvidence with a different timestamp is considered invalid. Any node that formed invalid DuplicateVoteEvidence will continue to propose invalid evidence; its peers may see this, and choose to disconnect from this node. This bug means that double signs are DoS vectors in Tendermint Core v0.34.0-v0.34.2. Tendermint Core v0.34.3 is a security release which fixes this bug. As of v0.34.3, DuplicateVoteEvidence is no longer formed by the consensus reactor; rather, the consensus reactor passes the Votes themselves into the EvidencePool, which is now responsible for forming DuplicateVoteEvidence. The EvidencePool has timestamp info that should be consistent across the network, which means that DuplicateVoteEvidence formed in this reactor should have consistent timestamps. This release changes the API between the consensus and evidence reactors.
Severity
6.5 (Medium)
CWE
- CWE-400 - {"CWE-400":"Uncontrolled Resource Consumption"}
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tendermint/tendermint/security… | x_refsource_CONFIRM |
| https://github.com/tendermint/tendermint/blob/v0.… | x_refsource_MISC |
| https://github.com/tendermint/tendermint/commit/a… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tendermint | tendermint |
Affected:
>= 0.34.0, < 0.34.3
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CVE-2021-21267 (GCVE-0-2021-21267)
Vulnerability from cvelistv5 – Published: 2021-03-19 20:25 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Regular Expression Denial-of-Service in npm schema-inspector
Summary
Schema-Inspector is an open-source tool to sanitize and validate JS objects (npm package schema-inspector). In before version 2.0.0, email address validation is vulnerable to a denial-of-service attack where some input (for example `a@0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.`) will freeze the program or web browser page executing the code. This affects any current schema-inspector users using any version to validate email addresses. Users who do not do email validation, and instead do other types of validation (like string min or max length, etc), are not affected. Users should upgrade to version 2.0.0, which uses a regex expression that isn't vulnerable to ReDoS.
Severity
7.5 (High)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/schema-inspector/schema-inspec… | x_refsource_CONFIRM |
| https://gist.github.com/mattwelke/b7f42424680a57b… | x_refsource_MISC |
| https://www.npmjs.com/package/schema-inspector | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021052… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| schema-inspector | schema-inspector |
Affected:
< 2.0.0
|
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CVE-2021-21254 (GCVE-0-2021-21254)
Vulnerability from cvelistv5 – Published: 2021-01-29 21:55 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Regular expression Denial of Service in Markdown plugin
Summary
CKEditor 5 is an open source rich text editor framework with a modular architecture. The CKEditor 5 Markdown plugin (@ckeditor/ckeditor5-markdown-gfm) before version 25.0.0 has a regex denial of service (ReDoS) vulnerability. The vulnerability allowed to abuse link recognition regular expression, which could cause a significant performance drop resulting in browser tab freeze. It affects all users using CKEditor 5 Markdown plugin at version <= 24.0.0. The problem has been recognized and patched. The fix will be available in version 25.0.0.
Severity
6.5 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/ckeditor/ckeditor5/security/ad… | x_refsource_CONFIRM |
| https://github.com/ckeditor/ckeditor5/releases/ta… | x_refsource_MISC |
| https://www.npmjs.com/package/%40ckeditor/ckedito… | x_refsource_MISC |
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CVE-2021-21252 (GCVE-0-2021-21252)
Vulnerability from cvelistv5 – Published: 2021-01-13 00:00 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Regular expression denial of service in jquery-validation
Summary
The jQuery Validation Plugin provides drop-in validation for your existing forms. It is published as an npm package "jquery-validation". jquery-validation before version 1.19.3 contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service). This is fixed in 1.19.3.
Severity
5.3 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
6 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| jquery-validation | jquery-validation |
Affected:
< 1.19.3
|
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CVE-2021-21240 (GCVE-0-2021-21240)
Vulnerability from cvelistv5 – Published: 2021-02-08 19:45 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Regular Expression Denial of Service in httplib2
Summary
httplib2 is a comprehensive HTTP client library for Python. In httplib2 before version 0.19.0, a malicious server which responds with long series of "\xa0" characters in the "www-authenticate" header may cause Denial of Service (CPU burn while parsing header) of the httplib2 client accessing said server. This is fixed in version 0.19.0 which contains a new implementation of auth headers parsing using the pyparsing library.
Severity
7.5 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/httplib2/httplib2/security/adv… | x_refsource_CONFIRM |
| https://github.com/httplib2/httplib2/pull/182 | x_refsource_MISC |
| https://github.com/httplib2/httplib2/commit/bd9ee… | x_refsource_MISC |
| https://pypi.org/project/httplib2 | x_refsource_MISC |
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CVE-2021-21236 (GCVE-0-2021-21236)
Vulnerability from cvelistv5 – Published: 2021-01-06 17:00 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Regular Expression Denial of Service in CairoSVG
Summary
CairoSVG is a Python (pypi) package. CairoSVG is an SVG converter based on Cairo. In CairoSVG before version 2.5.1, there is a regular expression denial of service (REDoS) vulnerability. When processing SVG files, the python package CairoSVG uses two regular expressions which are vulnerable to Regular Expression Denial of Service (REDoS). If an attacker provides a malicious SVG, it can make cairosvg get stuck processing the file for a very long time. This is fixed in version 2.5.1. See Referenced GitHub advisory for more information.
Severity
5.7 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Kozea/CairoSVG/security/adviso… | x_refsource_CONFIRM |
| https://pypi.org/project/CairoSVG/ | x_refsource_MISC |
| https://github.com/Kozea/CairoSVG/commit/cfc9175e… | x_refsource_MISC |
| https://github.com/Kozea/CairoSVG/releases/tag/2.5.1 | 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.