CVE-2019-11479
Exploitation likely. EPSS gives it a 92% chance of exploitation in the next 30 days. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
92% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
8 events over 2564 days, from the signal feeds we watch.
- OpenVAS check added
- EPSS band changemoderate → critical
- Patch availableworkaround available, record updated
- Publishedweakness classified, att&ck mapped
Affected products
- big-ip advanced firewall managerNetworking Infrastructure / firewall
- big-ip access policy managerNetworking Infrastructure / firewall
- big-ip application acceleration managerNetworking Infrastructure / load-balancer-proxy
- big-ip link controllerNetworking Infrastructure / router-switch
- big-ip policy enforcement managerNetworking Infrastructure
- big-ip webacceleratorNetworking Infrastructure / vpn-gateway
- big-ip application security managerNetworking Infrastructure / firewall
- big-ip local traffic managerNetworking Infrastructure / load-balancer-proxy
- Enterprise Communications BrokerCommunications
- Oracle Communications Session Border ControllerNetworking Infrastructure
- Oracle Enterprise Session Border ControllerNetworking Infrastructure
- Oracle Communications Session RouterCommunications
- Oracle Communications Subscriber-Aware Load BalancerNetworking Infrastructure / load-balancer-proxy
And 50 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Scored 7.5 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity NoneNo integrity impact
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt&
- openwall.com/lists/oss-security/2019/06/28/2&
- openwall.com/lists/oss-security/2019/07/06/3&
And 77 more references. See all after sign-in
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