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18 vulnerabilities found for libssh2 by The libssh2 Project
CVE-2019-3856 (GCVE-0-2019-3856)
Vulnerability from cvelistv5 – Published: 2019-03-25 18:31 – Updated: 2025-04-23 19:48
VLAI
Summary
An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
16 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
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CVE-2019-3857 (GCVE-0-2019-3857)
Vulnerability from cvelistv5 – Published: 2019-03-25 18:30 – Updated: 2025-04-23 19:48
VLAI
Summary
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
16 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
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CVE-2019-3860 (GCVE-0-2019-3860)
Vulnerability from cvelistv5 – Published: 2019-03-25 18:30 – Updated: 2024-08-04 19:19
VLAI
Summary
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SFTP packets with empty payloads are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Severity
5 (Medium)
CWE
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://www.libssh2.org/CVE-2019-3860.html | x_refsource_MISC |
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| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2019/dsa-4431 | vendor-advisoryx_refsource_DEBIAN |
| https://seclists.org/bugtraq/2019/Apr/25 | mailing-listx_refsource_BUGTRAQ |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://lists.debian.org/debian-lts-announce/2019… | mailing-listx_refsource_MLIST |
| https://www.oracle.com/technetwork/security-advis… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
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CVE-2019-3861 (GCVE-0-2019-3861)
Vulnerability from cvelistv5 – Published: 2019-03-25 18:30 – Updated: 2024-08-04 19:19
VLAI
Summary
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH packets with a padding length value greater than the packet length are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Severity
5 (Medium)
CWE
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://www.libssh2.org/CVE-2019-3861.html | x_refsource_MISC |
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| https://www.oracle.com/technetwork/security-advis… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
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CVE-2019-3863 (GCVE-0-2019-3863)
Vulnerability from cvelistv5 – Published: 2019-03-25 17:52 – Updated: 2025-12-19 03:02
VLAI
Summary
A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used by the SSH client as an index to copy memory causing in an out of bounds memory write error.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
16 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
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CVE-2019-3858 (GCVE-0-2019-3858)
Vulnerability from cvelistv5 – Published: 2019-03-21 20:22 – Updated: 2024-08-04 19:19
VLAI
Summary
An out of bounds read flaw was discovered in libssh2 before 1.8.1 when a specially crafted SFTP packet is received from the server. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Severity
5 (Medium)
CWE
Assigner
References
17 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
Date Public
2019-03-13 00:00
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CVE-2019-3855 (GCVE-0-2019-3855)
Vulnerability from cvelistv5 – Published: 2019-03-21 20:13 – Updated: 2025-12-17 21:40
VLAI
Summary
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
27 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
Date Public
2019-03-13 00:00
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CVE-2019-3862 (GCVE-0-2019-3862)
Vulnerability from cvelistv5 – Published: 2019-03-20 21:39 – Updated: 2024-08-04 19:19
VLAI
Summary
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit status message and no payload are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Severity
7.3 (High)
CWE
Assigner
References
18 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
Date Public
2019-03-13 00:00
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CVE-2019-3859 (GCVE-0-2019-3859)
Vulnerability from cvelistv5 – Published: 2019-03-20 21:18 – Updated: 2025-12-18 11:43
VLAI
Summary
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Severity
5 (Medium)
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
20 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
Date Public
2019-03-13 00:00
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CVE-2019-3856 (GCVE-0-2019-3856)
Vulnerability from nvd – Published: 2019-03-25 18:31 – Updated: 2025-04-23 19:48
VLAI
Summary
An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
16 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
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CVE-2019-3857 (GCVE-0-2019-3857)
Vulnerability from nvd – Published: 2019-03-25 18:30 – Updated: 2025-04-23 19:48
VLAI
Summary
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
16 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
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CVE-2019-3860 (GCVE-0-2019-3860)
Vulnerability from nvd – Published: 2019-03-25 18:30 – Updated: 2024-08-04 19:19
VLAI
Summary
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SFTP packets with empty payloads are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Severity
5 (Medium)
CWE
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://www.libssh2.org/CVE-2019-3860.html | x_refsource_MISC |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://lists.debian.org/debian-lts-announce/2019… | mailing-listx_refsource_MLIST |
| https://security.netapp.com/advisory/ntap-2019032… | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2019/dsa-4431 | vendor-advisoryx_refsource_DEBIAN |
| https://seclists.org/bugtraq/2019/Apr/25 | mailing-listx_refsource_BUGTRAQ |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://lists.debian.org/debian-lts-announce/2019… | mailing-listx_refsource_MLIST |
| https://www.oracle.com/technetwork/security-advis… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
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CVE-2019-3861 (GCVE-0-2019-3861)
Vulnerability from nvd – Published: 2019-03-25 18:30 – Updated: 2024-08-04 19:19
VLAI
Summary
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH packets with a padding length value greater than the packet length are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Severity
5 (Medium)
CWE
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://www.libssh2.org/CVE-2019-3861.html | x_refsource_MISC |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://lists.debian.org/debian-lts-announce/2019… | mailing-listx_refsource_MLIST |
| https://security.netapp.com/advisory/ntap-2019032… | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2019/dsa-4431 | vendor-advisoryx_refsource_DEBIAN |
| https://seclists.org/bugtraq/2019/Apr/25 | mailing-listx_refsource_BUGTRAQ |
| https://access.redhat.com/errata/RHSA-2019:2136 | vendor-advisoryx_refsource_REDHAT |
| https://www.oracle.com/technetwork/security-advis… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
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CVE-2019-3863 (GCVE-0-2019-3863)
Vulnerability from nvd – Published: 2019-03-25 17:52 – Updated: 2025-12-19 03:02
VLAI
Summary
A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used by the SSH client as an index to copy memory causing in an out of bounds memory write error.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
16 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
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CVE-2019-3858 (GCVE-0-2019-3858)
Vulnerability from nvd – Published: 2019-03-21 20:22 – Updated: 2024-08-04 19:19
VLAI
Summary
An out of bounds read flaw was discovered in libssh2 before 1.8.1 when a specially crafted SFTP packet is received from the server. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Severity
5 (Medium)
CWE
Assigner
References
17 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
Date Public
2019-03-13 00:00
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CVE-2019-3855 (GCVE-0-2019-3855)
Vulnerability from nvd – Published: 2019-03-21 20:13 – Updated: 2025-12-17 21:40
VLAI
Summary
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
27 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
Date Public
2019-03-13 00:00
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CVE-2019-3862 (GCVE-0-2019-3862)
Vulnerability from nvd – Published: 2019-03-20 21:39 – Updated: 2024-08-04 19:19
VLAI
Summary
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit status message and no payload are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Severity
7.3 (High)
CWE
Assigner
References
18 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
Date Public
2019-03-13 00:00
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CVE-2019-3859 (GCVE-0-2019-3859)
Vulnerability from nvd – Published: 2019-03-20 21:18 – Updated: 2025-12-18 11:43
VLAI
Summary
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Severity
5 (Medium)
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
20 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libssh2 Project | libssh2 |
Affected:
1.8.1
|
Date Public
2019-03-13 00:00
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"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00102.html"
},
{
"name": "openSUSE-SU-2019:1291",
"refsource": "SUSE",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00103.html"
},
{
"name": "[debian-lts-announce] 20190725 [SECURITY] [DLA 1730-3] libssh2 regression update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2019/07/msg00024.html"
},
{
"name": "https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html",
"refsource": "MISC",
"url": "https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2019-3859",
"datePublished": "2019-03-20T21:18:13.000Z",
"dateReserved": "2019-01-03T00:00:00.000Z",
"dateUpdated": "2025-12-18T11:43:47.109Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}