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 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 commit 3b4929f65b0d8249f19a50245cd88ed1a2f78cff.
Vulnerability class: Integer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.987 (99.9th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 99.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.987 · newest: 0.987 · change: 0.000
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
- www.kb.cert.org/vuls/id/905115 (US Government Resource, Third Party Advisory, third-party-advisory)
- www.openwall.com/lists/oss-security/2019/06/20/3 (mailing-list, Mailing List, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:1594 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:1602 (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2019/06/28/2 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2019/07/06/3 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2019/07/06/4 (mailing-list, Mailing List, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:1699 (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2019/10/24/1 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2019/10/29/3 (mailing-list, 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.