Integer overflow in F5 Big-ip_access_policy_manager
CVE-2019-11477
Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of servi…
Vulnerability class: Integer Overflow
EPSS: 0.987 (99.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- F5 Big-ip_access_policy_manager — versions 15.0.0
- F5 Big-ip_advanced_firewall_manager — versions 15.0.0
- F5 Big-ip_analytics — versions 15.0.0
- F5 Big-ip_application_acceleration_manager — versions 15.0.0
- F5 Big-ip_application_security_manager — versions 15.0.0
- F5 Big-ip_domain_name_system — versions 15.0.0
- F5 Big-ip_edge_gateway — versions 15.0.0
- F5 Big-ip_fraud_protection_service — versions 15.0.0
- F5 Big-ip_global_traffic_manager — versions 15.0.0
- F5 Big-ip_link_controller — versions 15.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@ubuntu.com (US Government Resource, x_refsource_CERT-VN, Third Party Advisory, third-party-advisory)
- security@ubuntu.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security@ubuntu.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- security@ubuntu.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- security@ubuntu.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security@ubuntu.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security@ubuntu.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security@ubuntu.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- security@ubuntu.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security@ubuntu.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-11477?
- CVE-2019-11477 is a high-severity vulnerability in F5 Big-ip_access_policy_manager, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2019-06-19.
- How severe is CVE-2019-11477?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-11477 known to be exploited?
- 15 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.