Common Weakness Enumeration
CWE-772
AllowedMissing Release of Resource after Effective Lifetime
Abstraction: Base · Status: Draft
The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.
125 vulnerabilities reference this CWE, most recent first.
CVE-2021-1523 (GCVE-0-2021-1523)
Vulnerability from cvelistv5 – Published: 2021-08-25 19:10 – Updated: 2024-11-07 22:03
VLAI
EPSS
VEX
Title
Cisco Nexus 9000 Series Fabric Switches ACI Mode Queue Wedge Denial of Service Vulnerability
Summary
A vulnerability in Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) Mode could allow an unauthenticated, remote attacker to cause a queue wedge on a leaf switch, which could result in critical control plane traffic to the device being dropped. This could result in one or more leaf switches being removed from the fabric. This vulnerability is due to mishandling of ingress TCP traffic to a specific port. An attacker could exploit this vulnerability by sending a stream of TCP packets to a specific port on a Switched Virtual Interface (SVI) configured on the device. A successful exploit could allow the attacker to cause a specific packet queue to queue network buffers but never process them, leading to an eventual queue wedge. This could cause control plane traffic to be dropped, resulting in a denial of service (DoS) condition where the leaf switches are unavailable. Note: This vulnerability requires a manual intervention to power-cycle the device to recover.
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-07 21:54 UTC
CWE
Assigner
cisco
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://tools.cisco.com/security/center/content/C… | vendor-advisoryx_refsource_CISCO |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco NX-OS System Software in ACI Mode |
Affected:
n/a
|
Date Public
2021-08-25 00:00
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CVE-2020-27351 (GCVE-0-2020-27351)
Vulnerability from cvelistv5 – Published: 2020-12-10 04:05 – Updated: 2024-09-16 22:15
VLAI
EPSS
VEX
Title
Various memory and file descriptor leaks in apt-python
Summary
Various memory and file descriptor leaks were found in apt-python files python/arfile.cc, python/tag.cc, python/tarfile.cc, aka GHSL-2020-170. This issue affects: python-apt 1.1.0~beta1 versions prior to 1.1.0~beta1ubuntu0.16.04.10; 1.6.5ubuntu0 versions prior to 1.6.5ubuntu0.4; 2.0.0ubuntu0 versions prior to 2.0.0ubuntu0.20.04.2; 2.1.3ubuntu1 versions prior to 2.1.3ubuntu1.1;
Severity
CWE
- CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
canonical
CNA
References
3 references
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/bugs/1899193 | x_refsource_MISC |
| https://usn.ubuntu.com/usn/usn-4668-1 | x_refsource_MISC |
| https://www.debian.org/security/2020/dsa-4809 | vendor-advisoryx_refsource_DEBIAN |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | python-apt |
Affected:
1.1.0~beta1 , < 1.1.0~beta1ubuntu0.16.04.10
(custom)
Affected: 1.6.5ubuntu0 , < 1.6.5ubuntu0.4 (custom) Affected: 2.0.0ubuntu0 , < 2.0.0ubuntu0.20.04.2 (custom) Affected: 2.1.3ubuntu1 , < 2.1.3ubuntu1.1 (custom) |
Date Public
2020-12-09 00:00
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CVE-2020-14339 (GCVE-0-2020-14339)
Vulnerability from cvelistv5 – Published: 2020-12-03 00:00 – Updated: 2024-08-04 12:39
VLAI
EPSS
VEX
Summary
A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This file descriptor allows for privileged operations to happen against the device-mapper on the host. This flaw allows a malicious guest user or process to perform operations outside of their standard permissions, potentially causing serious damage to the host operating system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Severity
No CVSS data available.
CWE
Assigner
redhat
CNA
References
3 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1860069 | |
| https://security.gentoo.org/glsa/202101-22 | vendor-advisory |
| https://security.gentoo.org/glsa/202210-06 | vendor-advisory |
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CVE-2019-3883 (GCVE-0-2019-3883)
Vulnerability from cvelistv5 – Published: 2019-04-17 00:00 – Updated: 2024-08-04 19:19
VLAI
EPSS
VEX
Summary
In 389-ds-base up to version 1.4.1.2, requests are handled by workers threads. Each sockets will be waited by the worker for at most 'ioblocktimeout' seconds. However this timeout applies only for un-encrypted requests. Connections using SSL/TLS are not taking this timeout into account during reads, and may hang longer.An unauthenticated attacker could repeatedly create hanging LDAP requests to hang all the workers, resulting in a Denial of Service.
Severity
5.3 (Medium)
CWE
Assigner
redhat
CNA
References
7 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | 389-ds-base |
Affected:
affects up to 1.4.1.2
|
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CVE-2019-3821 (GCVE-0-2019-3821)
Vulnerability from cvelistv5 – Published: 2019-03-27 12:22 – Updated: 2024-08-04 19:19
VLAI
EPSS
VEX
Summary
A flaw was found in the way civetweb frontend was handling requests for ceph RGW server with SSL enabled. An unauthenticated attacker could create multiple connections to ceph RADOS gateway to exhaust file descriptors for ceph-radosgw service resulting in a remote denial of service.
Severity
7.5 (High)
CWE
Assigner
redhat
CNA
References
3 references
| URL | Tags |
|---|---|
| https://usn.ubuntu.com/4035-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://github.com/ceph/civetweb/pull/33 | x_refsource_MISC |
Date Public
2019-02-11 00:00
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Mitigation MIT-3
Requirements
Strategy: Language Selection
- Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, languages such as Java, Ruby, and Lisp perform automatic garbage collection that releases memory for objects that have been deallocated.
Mitigation
Implementation
It is good practice to be responsible for freeing all resources you allocate and to be consistent with how and where you free resources in a function. If you allocate resources that you intend to free upon completion of the function, you must be sure to free the resources at all exit points for that function including error conditions.
Mitigation MIT-47
Operation
Architecture and Design
Strategy: Resource Limitation
- Use resource-limiting settings provided by the operating system or environment. For example, when managing system resources in POSIX, setrlimit() can be used to set limits for certain types of resources, and getrlimit() can determine how many resources are available. However, these functions are not available on all operating systems.
- When the current levels get close to the maximum that is defined for the application (see CWE-770), then limit the allocation of further resources to privileged users; alternately, begin releasing resources for less-privileged users. While this mitigation may protect the system from attack, it will not necessarily stop attackers from adversely impacting other users.
- Ensure that the application performs the appropriate error checks and error handling in case resources become unavailable (CWE-703).
CAPEC-469: HTTP DoS
An attacker performs flooding at the HTTP level to bring down only a particular web application rather than anything listening on a TCP/IP connection. This denial of service attack requires substantially fewer packets to be sent which makes DoS harder to detect. This is an equivalent of SYN flood in HTTP. The idea is to keep the HTTP session alive indefinitely and then repeat that hundreds of times. This attack targets resource depletion weaknesses in web server software. The web server will wait to attacker's responses on the initiated HTTP sessions while the connection threads are being exhausted.