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)
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
Assigner
References
URL Tags
http://www.openwall.com/lists/oss-security/2019/03/18/3 mailing-listx_refsource_MLIST
https://seclists.org/bugtraq/2019/Mar/25 mailing-listx_refsource_BUGTRAQ
https://www.libssh2.org/CVE-2019-3855.html x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… x_refsource_CONFIRM
http://packetstormsecurity.com/files/152136/Slack… x_refsource_MISC
http://www.securityfocus.com/bid/107485 vdb-entryx_refsource_BID
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://www.broadcom.com/support/fibre-channel-ne… 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
https://access.redhat.com/errata/RHSA-2019:0679 vendor-advisoryx_refsource_REDHAT
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-2019:1175 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1652 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1791 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1943 vendor-advisoryx_refsource_REDHAT
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://access.redhat.com/errata/RHSA-2019:2399 vendor-advisoryx_refsource_REDHAT
https://support.apple.com/kb/HT210609 x_refsource_CONFIRM
https://seclists.org/bugtraq/2019/Sep/49 mailing-listx_refsource_BUGTRAQ
http://seclists.org/fulldisclosure/2019/Sep/42 mailing-listx_refsource_FULLDISC
https://www.oracle.com/technetwork/security-advis… x_refsource_MISC
Impacted products
Date Public
2019-03-13 00:00
Show details on NVD website
To clipboard 

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    "assignerShortName": "redhat",
    "cveId": "CVE-2019-3855",
    "datePublished": "2019-03-21T20:13:25.000Z",
    "dateReserved": "2019-01-03T00:00:00.000Z",
    "dateUpdated": "2025-12-17T21:40:11.249Z",
    "state": "PUBLISHED"
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"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.\"}, {\"lang\": \"es\", \"value\": \"Se ha descubierto un error de desbordamiento de enteros que podr\\u00eda conducir a una escritura fuera de l\\u00edmites en libssh2, en versiones anteriores a la 1.8.1, en la forma en la que los paquetes se leen desde el servidor. Un atacante remoto que comprometa un servidor SSH podr\\u00eda ser capaz de ejecutar c\\u00f3digo en el sistema del cliente cuando un usuario se conecta al servidor\"}]",
      "id": "CVE-2019-3855",
      "lastModified": "2024-11-21T04:42:43.427",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\", \"baseScore\": 8.8, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 5.9}], \"cvssMetricV30\": [{\"source\": \"secalert@redhat.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.0\", \"vectorString\": \"CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.6, \"impactScore\": 5.9}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:M/Au:N/C:C/I:C/A:C\", \"baseScore\": 9.3, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"MEDIUM\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"COMPLETE\", \"integrityImpact\": \"COMPLETE\", \"availabilityImpact\": \"COMPLETE\"}, \"baseSeverity\": \"HIGH\", \"exploitabilityScore\": 8.6, \"impactScore\": 10.0, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": true}]}",
      "published": "2019-03-21T21:29:00.433",
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      "vulnStatus": "Modified",
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}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.