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CVE-2019-3856

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Date: March 25, 2019

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.

Language: C

Severity Score

Related Resources (22)

https://access.redhat.com/errata/RHSA-2019:2399
https://security.netapp.com/advisory/ntap-20190327-0005/
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
https://access.redhat.com/errata/RHSA-2019:1175
https://access.redhat.com/errata/RHSA-2019:1791
https://access.redhat.com/errata/RHSA-2019:1652
https://security-tracker.debian.org/tracker/CVE-2019-3856
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3856
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
https://access.redhat.com/security/cve/CVE-2019-3856
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
https://seclists.org/bugtraq/2019/Apr/25
https://www.debian.org/security/2019/dsa-4431
https://security.alpinelinux.org/vuln/CVE-2019-3856
https://access.redhat.com/errata/RHSA-2019:0679
https://access.redhat.com/errata/RHSA-2019:1943
https://www.libssh2.org/CVE-2019-3856.html
https://nvd.nist.gov/vuln/detail/CVE-2019-3856
https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-3856
https://www.mend.io/vulnerability-database/CVE-2019-3856

Severity Score

Weakness Type (CWE)

Integer Overflow or Wraparound

CWE-190

Out-of-bounds Write

CWE-787

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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