CVE-2019-8460
OpenBSD TCP SACK Hole Chain DoS
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.
INFO
Published Date :
Aug. 26, 2019, 8:15 p.m.
Last Modified :
Aug. 2, 2021, 5:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2019-8460 has a 2 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-8460.
| URL | 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
DC-1 is a purposely built vulnerable lab for the purpose of gaining experience in the world of penetration testing. It was designed to be a challenge for beginners, but just how easy it is will depend on your skills and knowledge, and your ability to learn.
2019年天融信阿尔法实验室在微信公众号发布的所有安全资讯汇总
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-8460 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-8460 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Aug. 02, 2021
Action Type Old Value New Value Added Reference https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03 [No Types Assigned] -
Modified Analysis by [email protected]
Oct. 22, 2020
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/ No Types Assigned https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/ Exploit, Patch, Press/Media Coverage, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20190905-0001/ No Types Assigned https://security.netapp.com/advisory/ntap-20190905-0001/ Third Party Advisory Removed CWE NIST CWE-20 Added CWE NIST NVD-CWE-Other -
CVE Modified by [email protected]
Nov. 27, 2019
Action Type Old Value New Value Changed Description Reuven Plevinsky and Tal Vainshtein of Check Point Software Technologies Ltd. discovered that OpenBSD kernel (all versions, including 6.5) can be forced to create long chains of TCP SACK holes that cause very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service. 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. -
CVE Modified by [email protected]
Oct. 22, 2019
Action Type Old Value New Value Added Reference https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/ [No Types Assigned] -
CVE Modified by [email protected]
Oct. 09, 2019
Action Type Old Value New Value Added CWE Check Point Software Technologies Ltd. CWE-1049 -
CVE Modified by [email protected]
Sep. 06, 2019
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20190905-0001/ [No Types Assigned] -
Initial Analysis by [email protected]
Sep. 04, 2019
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig No Types Assigned https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig Exploit, Vendor Advisory Changed Reference Type https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f No Types Assigned https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f Patch, Third Party Advisory Added CWE CWE-20 Added CPE Configuration OR *cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:* versions up to (including) 6.5
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-8460 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-8460
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.38 }} 0.11%
score
0.73342
percentile