CVE-2019-11477
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2019-11477
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2019-11477.html
Vendor advisory: arch — https://security.archlinux.org/ASA-201906-13
Vendor advisory: arch — https://security.archlinux.org/ASA-201906-14
Vendor advisory: arch — https://security.archlinux.org/ASA-201906-15
Vendor advisory: arch — https://security.archlinux.org/ASA-201906-12
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 5.1.11.a-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 4.19.37-4 |
| debian | bullseye | fixed | 4.19.37-4 |
| debian | forky | fixed | 4.19.37-4 |
| debian | sid | fixed | 4.19.37-4 |
| debian | trixie | fixed | 4.19.37-4 |
References
Verify integrity in audit chain (admin only). AS-IS.