Medium severity · published Oct 10, 2018
CVE-2018-15311
When F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.3.5, 11.6.0-11.6.3.2, or 11.5.1-11.5.6 is processing specially crafted TCP traffic with the Large Receive Offload (LRO) feature…
5.9
CVSS
1.4%
EPSS
No
On KEV
Description
When F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.3.5, 11.6.0-11.6.3.2, or 11.5.1-11.5.6 is processing specially crafted TCP traffic with the Large Receive Offload (LRO) feature enabled, TMM may crash, leading to a failover event. This vulnerability is not exposed unless LRO is enabled, so most affected customers will be on 13.1.x. LRO has been available since 11.4.0 but is not enabled by default until 13.1.0.
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BA
Big-ip Access Policy Manager · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
BA
Big-ip Advanced Firewall Manager · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
BA
Big-ip Analytics · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
BA
Big-ip Application Acceleration Manager · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
BA
Big-ip Application Security Manager · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
BD
Big-ip Domain Name System · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
BE
Big-ip Edge Gateway · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
BF
Big-ip Fraud Protection Service · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
BG
Big-ip Global Traffic Manager · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
BL
Big-ip Link Controller · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
BL
Big-ip Local Traffic Manager · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
BP
Big-ip Policy Enforcement Manager · F5
11.5.1 through 11.5.6; 11.6.0.0 through 11.6.3.2; 12.1.0.0 through 12.1.3.5; 13.0.0.0 through 13.1.0.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-15311
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-15311
Mitigation
https://support.f5.com/csp/article/K07550539
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