High severity · published Jun 19, 2019
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)
7.5
CVSS
98.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)98.7% · higher than 100% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CS
Connect Secure · Ivanti
All versions, or not specified · source: NVD
KE
Kernel · Linux
2.6.29 before 3.16.69; 3.17 before 4.4.182; 4.5 before 4.9.182; 4.10 before 4.14.127; 4.15 before 4.19.52; 4.20 before 5.1.11 · source: NVD
BA
Big-ip Access Policy Manager · F5
11.5.2 through 11.6.4; 12.1.0 through 12.1.4; 13.1.0 through 13.1.1; 14.0.0 through 14.1.0; 15.0.0 · source: NVD
BA
Big-ip Advanced Firewall Manager · F5
11.5.2 through 11.6.4; 12.1.0 through 12.1.4; 13.1.0 through 13.1.1; 14.0.0 through 14.1.0; 15.0.0 · source: NVD
BA
Big-ip Analytics · F5
11.5.2 through 11.6.4; 12.1.0 through 12.1.4; 13.1.0 through 13.1.1; 14.0.0 through 14.1.0; 15.0.0 · source: NVD
BA
Big-ip Application Acceleration Manager · F5
11.5.2 through 11.6.4; 12.1.0 through 12.1.4; 13.1.0 through 13.1.1; 14.0.0 through 14.1.0; 15.0.0 · source: NVD
BA
Big-ip Application Security Manager · F5
11.5.2 through 11.6.4; 12.1.0 through 12.1.4; 13.1.0 through 13.1.1; 14.0.0 through 14.1.0; 15.0.0 · source: NVD
BD
Big-ip Domain Name System · F5
11.5.2 through 11.6.4; 12.1.0 through 12.1.4; 13.1.0 through 13.1.1; 14.0.0 through 14.1.0; 15.0.0 · source: NVD
BE
Big-ip Edge Gateway · F5
11.5.2 through 11.6.4; 12.1.0 through 12.1.4; 13.1.0 through 13.1.1; 14.0.0 through 14.1.0; 15.0.0 · source: NVD
BF
Big-ip Fraud Protection Service · F5
11.5.2 through 11.6.4; 12.1.0 through 12.1.4; 13.1.0 through 13.1.1; 14.0.0 through 14.1.0; 15.0.0 · source: NVD
BG
Big-ip Global Traffic Manager · F5
11.5.2 through 11.6.4; 12.1.0 through 12.1.4; 13.1.0 through 13.1.1; 14.0.0 through 14.1.0; 15.0.0 · source: NVD
BL
Big-ip Link Controller · F5
11.5.2 through 11.6.4; 12.1.0 through 12.1.4; 13.1.0 through 13.1.1; 14.0.0 through 14.1.0; 15.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-11477
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-11477
Third Party Advisory
http://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html
Third Party Advisory
http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
Third Party Advisory
http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
Third Party Advisory
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191225-01-kernel-en
Mailing List
http://www.openwall.com/lists/oss-security/2019/06/20/3
Mailing List
http://www.openwall.com/lists/oss-security/2019/06/28/2
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