Vulnerability Details : CVE-2019-8460
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.
Published
2019-08-26 20:15:10
Updated
2021-08-02 17:15:13
Vulnerability category: Denial of service
Products affected by CVE-2019-8460
- cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-8460
0.39%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 73 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-8460
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2019-8460
-
The product performs a data query with a large number of joins and sub-queries on a large data table.Assigned by: cve@checkpoint.com (Secondary)
References for CVE-2019-8460
-
https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig
Exploit;Vendor Advisory
-
https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f
Received SACK options are managed by a linked list at the TCP socket. · openbsd/src@ed8fdce · GitHubPatch;Third Party Advisory
-
https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/
TCP SACK Security Issue in OpenBSD - CVE-2019-8460 - Check Point ResearchExploit;Patch;Press/Media Coverage;Third Party Advisory
-
https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03
Siemens Industrial Products (Update N) | CISA
-
https://security.netapp.com/advisory/ntap-20190905-0001/
CVE-2019-8460 OpenBSD Vulnerability in NetApp Products | NetApp Product SecurityThird Party Advisory
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