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 :

Nov. 21, 2024, 4:49 a.m.

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.

Affected Products

The following products are affected by CVE-2019-8460 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Openbsd openbsd

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.

Updated: 9 months, 1 week ago
2 stars 0 fork 0 watcher
Born at : May 30, 2021, 2:22 p.m. This repo has been linked 39 different CVEs too.

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

Updated: 3 months, 1 week ago
34 stars 5 fork 5 watcher
Born at : Jan. 11, 2021, 2:13 a.m. This repo has been linked 241 different CVEs too.

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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig
    Added Reference https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f
    Added Reference https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/
    Added Reference https://security.netapp.com/advisory/ntap-20190905-0001/
    Added Reference https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03
  • 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
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
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.

0.39 }} 0.01%

score

0.72839

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability