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CVE-2019-3859

Publication date 21 March 2019

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.1 · Critical

Score breakdown

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.

From the Ubuntu Security Team

It was discovered that libssh2 incorrectly handled certain specially crafted packets. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information.

Read the notes from the security team

Status

Package Ubuntu Release Status
libssh2 24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco
Not affected
18.10 cosmic Ignored end of life
18.04 LTS bionic
Vulnerable
16.04 LTS xenial
14.04 LTS trusty

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Notes

msalvatore

Upstream fix causes regression: https://lists.opensuse.org/opensuse-security-announce/2019-04/msg00102.html Follow up patch: https://github.com/libssh2/libssh2/commit/ca2744483eac4e707084df5fc55cc69d57571dde

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libssh2

Severity score breakdown

Parameter Value
Base score 9.1 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H