OpenBSD up to 6.5 Kernel tcp_sack_option SACK Packet input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$5k-$25k0.00

Summaryinfo

A vulnerability was found in OpenBSD up to 6.5 and classified as problematic. This impacts the function tcp_sack_option of the component Kernel. The manipulation as part of SACK Packet results in input validation. This vulnerability is identified as CVE-2019-8460. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in OpenBSD up to 6.5 (Operating System). Affected is the function tcp_sack_option of the component Kernel. The manipulation as part of a SACK Packet leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

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.

The weakness was released 08/26/2019. This vulnerability is traded as CVE-2019-8460 since 02/18/2019. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 12/04/2023).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

02/18/2019 🔍
08/26/2019 +189 days 🔍
08/27/2019 +1 days 🔍
12/04/2023 +1560 days 🔍

Sourcesinfo

Advisory: ed8fdce754a5d8d14c09e989d8877707bd43906f
Status: Not defined
Confirmation: 🔍

CVE: CVE-2019-8460 (🔍)
GCVE (CVE): GCVE-0-2019-8460
GCVE (VulDB): GCVE-100-140886

Entryinfo

Created: 08/27/2019 12:37
Updated: 12/04/2023 14:39
Changes: 08/27/2019 12:37 (39), 08/06/2020 21:00 (1), 12/04/2023 14:38 (4), 12/04/2023 14:39 (19)
Complete: 🔍
Cache ID: 216::103

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