OpenBSD kernel version <= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service.
References
Link | Resource |
---|---|
https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig | Exploit Vendor Advisory |
https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f | Patch Third Party Advisory |
https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/ | Exploit Patch Press/Media Coverage Third Party Advisory |
https://security.netapp.com/advisory/ntap-20190905-0001/ | Third Party Advisory |
https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03 |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: checkpoint
Published: 2019-08-26T19:18:49
Updated: 2021-08-02T16:16:54
Reserved: 2019-02-18T00:00:00
Link: CVE-2019-8460
JSON object: View
NVD Information
Status : Modified
Published: 2019-08-26T20:15:10.030
Modified: 2021-08-02T17:15:12.697
Link: CVE-2019-8460
JSON object: View
Redhat Information
No data.