What’s Vulnerable › Vulnerabilities

CVE-2019-3858

• Severity: critical (CVSS 9.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-03-21 · updated 2026-10-14
• Weakness: CWE-125

Description

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.

Affected products

• Debian Linux: 8.0
• Fedoraproject Fedora: 29
• libssh2: before 1.8.1 — fixed in 1.8.1
• NetApp ONTAP Select Deploy administration utility: all versions
• openSUSE Leap: 15.0, 42.3

How to fix

Upgrade to a fixed version: libssh2 1.8.1. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.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://access.redhat.com/errata/RHSA-2019:2136
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3858
• https://lists.debian.org/debian-lts-announce/2019/03/msg00032.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

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