libssh2 1.10.0 _libssh2_packet_add out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in libssh2 1.10.0. The impacted element is the function _libssh2_packet_add. Executing a manipulation can lead to out-of-bounds. This vulnerability is tracked as CVE-2020-22218. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as problematic was found in libssh2 1.10.0. This vulnerability affects the function _libssh2_packet_add. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. CVE summarizes:

An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows attackers to access out of bounds memory.

The weakness was disclosed 08/23/2023. The advisory is shared for download at github.com. This vulnerability was named CVE-2020-22218 since 08/13/2020. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 239951 (TencentOS Server 2: libssh2 (TSSA-2023:0236)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (239951). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
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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Nessus ID: 239951
Nessus Name: TencentOS Server 2: libssh2 (TSSA-2023:0236)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

08/13/2020 🔍
08/23/2023 +1105 days 🔍
08/23/2023 +0 days 🔍
06/17/2025 +664 days 🔍

Sourcesinfo

Product: github.com

Advisory: DLA 3559-1
Status: Confirmed

CVE: CVE-2020-22218 (🔍)
GCVE (CVE): GCVE-0-2020-22218
GCVE (VulDB): GCVE-100-237772

Entryinfo

Created: 08/23/2023 10:16
Updated: 06/17/2025 22:45
Changes: 08/23/2023 10:16 (39), 09/16/2023 07:54 (1), 09/16/2023 08:00 (11), 06/17/2025 22:45 (17)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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