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CVE-2018-5518· NVD / CVE Program· CNA f5

On F5 BIG-IP 13.0.0-13.1.0.5 or 12.0.0-12.1.3.3, malicious root users with access to a VCMP guest can cause a disruption of service on adjac

On F5 BIG-IP 13.0.0-13.1.0.5 or 12.0.0-12.1.3.3, malicious root users with access to a VCMP guest can cause a disruption of service on adjacent VCMP guests running on the same host. Exploiting this vulnerability causes the vCMPd process on the adjacent VCMP guest to restart and produce a core file. This issue is only exploitable on a VCMP guest which is operating in "host-only" or "bridged" mode. VCMP guests which are "isolated" are not impacted by this issue and do not provide mechanism to exploit the vulnerability. Guests which are deployed in "Appliance Mode" may be impacted however the exploit is not possible from an Appliance Mode guest. To exploit this vulnerability root access on a guest system deployed as "host-only" or "bridged" mode is required.

MediumCVSS 5.4 · v3.0—No exploit No fix recorded
Published
May 2, 2018
Updated
Jun 16, 2026
EPSS
0.4% · 33th percentile
CWE
—
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Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

Affected systems

VendorProduct
f5big-ip local traffic manager
f5big-ip application acceleration manager
f5big-ip advanced firewall manager
f5big-ip analytics
f5big-ip access policy manager
f5big-ip application security manager
f5big-ip edge gateway
f5big-ip global traffic manager
f5big-ip link controller
f5big-ip policy enforcement manager
f5big-ip webaccelerator
f5big-ip websafe

and 1 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • f5 big-ip access policy manager12.0.0 and later · up to 12.1.3 inclusive
  • f5 big-ip access policy manager13.0.0 and later · up to 13.1.0 inclusive
  • f5 big-ip advanced firewall manager12.0.0 and later · up to 12.1.3 inclusive
  • f5 big-ip advanced firewall manager13.0.0 and later · up to 13.1.0 inclusive
  • f5 big-ip analytics13.0.0 and later · up to 13.1.0 inclusive
  • f5 big-ip analytics12.0.0 and later · up to 12.1.3 inclusive
  • f5 big-ip application acceleration manager12.0.0 and later · up to 12.1.3 inclusive
  • f5 big-ip application acceleration manager13.0.0 and later · up to 13.1.0 inclusive
  • f5 big-ip application security manager13.0.0 and later · up to 13.1.0 inclusive
  • f5 big-ip application security manager12.0.0 and later · up to 12.1.3 inclusive
  • f5 big-ip domain name system13.0.0 and later · up to 13.1.0 inclusive
  • f5 big-ip domain name system12.0.0 and later · up to 12.1.3 inclusive
  • f5 big-ip edge gateway13.0.0 and later · up to 13.1.0 inclusive
  • f5 big-ip edge gateway12.0.0 and later · up to 12.1.3 inclusive
  • f5 big-ip global traffic manager12.0.0 and later · up to 12.1.3 inclusive
  • f5 big-ip global traffic manager13.0.0 and later · up to 13.1.0 inclusive
  • f5 big-ip link controller12.0.0 and later · up to 12.1.3 inclusive
  • f5 big-ip link controller13.0.0 and later · up to 13.1.0 inclusive
  • f5 big-ip local traffic manager13.0.0 and later · up to 13.1.0 inclusive
  • f5 big-ip local traffic manager12.0.0 and later · up to 12.1.3 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (f5). Independent of NVD's CPE analysis and usually ahead of it.

  • F5 Networks, Inc. BIG-IP (LTM, AAM, AFM, Analytics, APM, ASM, DNS, Edge Gateway, GTM, Link Controller, PEM, WebAccelerator, WebSafe)

    • 13.0.0-13.1.0.5, 12.0.0-12.1.3.3affected

Same product

f5: all records

Other highest-scoring records for the same primary product.

  • CVE-2016-9244A BIG-IP virtual server configured with a Client SSL profile that has the non-default Session Tickets option enabled may leak up to 31 bytes
    52Plan
  • CVE-2016-5745F5 BIG-IP LTM systems 11.x before 11.2.1 HF16, 11.3.x, 11.4.x before 11.4.1 HF11, 11.5.0, 11.5.1 before HF11, 11.5.2, 11.5.3, 11.5.4 before
    40Plan
  • CVE-2019-6609Platform dependent weakness.
    39Monitor
  • CVE-2018-5506In F5 BIG-IP 13.0.0, 12.1.0-12.1.2, 11.6.1, 11.5.1-11.5.5, or 11.2.1 the Apache modules apache_auth_token_mod and mod_auth_f5_auth_token.cpp
    39Monitor
  • CVE-2017-6131In some circumstances, an F5 BIG-IP version 12.0.0 to 12.1.2 and 13.0.0 Azure cloud instance may contain a default administrative password w
    39Monitor
  • CVE-2019-6644Similar to the issue identified in CVE-2018-12120, on versions 14.1.0-14.1.0.5, 14.0.0-14.0.0.4, 13.0.0-13.1.2, and 12.1.0-12.1.4 BIG-IP wil
    37Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Adjacent
Attack complexity
High
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records