Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend qu…
Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363.
The product does not properly control the allocation and maintenance of a limited resource.
https://cwe.mitre.org/data/definitions/400.html →Open in CWE collection →The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric."
https://cwe.mitre.org/data/definitions/405.html →Open in CWE collection →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.
https://capec.mitre.org/data/definitions/147.html →Open in CAPEC collection →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.
https://capec.mitre.org/data/definitions/227.html →Open in CAPEC collection →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.
https://capec.mitre.org/data/definitions/492.html →Open in CAPEC collection →| Product | Vendor | Status |
|---|---|---|
| kernel | Tracked | |
| kernel | Tracked | |
| kernel | Tracked | |
| kernel | Tracked | |
| kernel | Tracked | |
| kernel | Tracked | |
| kernel | Tracked | |
| kernel | Tracked | |
| kernel | Tracked | |
| kernel | Tracked | |
| kernel | Tracked | |
| kernel | Tracked | |
| kernel | Tracked | |
| kernel-alt | Tracked | |
| kernel-rt | Tracked | |
| kernel-rt | Tracked | |
| kernel-rt | Tracked | |
| linux | Tracked | |
| linux | Tracked | |
| linux | Tracked |