THREATPORT/VULNERABILITY/CVE-2018-5743
HIGH SEVERITY

CVE-2018-5743

Big Ip Local Traffic Manager vulnerability

CVSS
7.5
EPSS
6.4%
EPSS pct
93th
Exploited
No known
By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contained an error which could be exploited to grow the number of simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -> 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5743.
Affected vendor
F5
Affected product
Big Ip Local Traffic Manager
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-770 — Allocation of Resources Without Limits or Throttling
Published
2019-10-09

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 6.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2018-5743

  • Confirm whether F5 Big Ip Local Traffic Manager is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-5743.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-5743

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-5743 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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