CVEvulnerability
CVE-2019-8460
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2019-08-26
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-1049
Description
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.
Affected configurations
• openbsd openbsd (<= 6.5)
Related
Weakness · CWE (1)
- CWE-1049 Excessive Data Query Operations in a Large Data Table weakness
References
- 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 us-cert.cisa.gov
- 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 us-cert.cisa.gov