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Vulnerability Intelligence

Vulnerability IntelligenceCVE-2019-3859

CVE-2019-3859

CRITICAL9.1

An out of bounds read flaw was discovered in libssh2 before 1

Published Mar 20, 2019

Modified 2 months ago

Details

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.

References

http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00102.html

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00103.html

http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html

http://www.openwall.com/lists/oss-security/2019/03/18/3

http://www.securityfocus.com/bid/107485

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3859

https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html

https://lists.debian.org/debian-lts-announce/2019/04/msg00006.html

https://lists.debian.org/debian-lts-announce/2019/07/msg00024.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/

https://seclists.org/bugtraq/2019/Apr/25

https://seclists.org/bugtraq/2019/Mar/25

https://security.netapp.com/advisory/ntap-20190327-0005/

https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767

https://www.cve.org/CVERecord?id=CVE-2019-3859

https://www.debian.org/security/2019/dsa-4431

https://www.libssh2.org/CVE-2019-3859.html

https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

CVSS Analysis

CVSS v3.1

9.1

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

NoneI:N

Availability

HighA:H

9.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Weakness Type (CWE)

Memory Safety

Out-of-bounds Read

Ecosystems

Timeline

PublishedMar 20, 2019

ModifiedDec 18, 2025

CVE-2019-3859 | Mondoo Vulnerability Intelligence