CVE-2019-3860

Description

An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SFTP packets with empty payloads are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.

Category

5.0
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.83% Top 30%
Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory libssh2.org
Affected: The libssh2 Project libssh2
Published at:
Updated at:

References

Link Tags
https://www.libssh2.org/CVE-2019-3860.html patch vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3860 issue tracking third party advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html third party advisory mailing list
https://security.netapp.com/advisory/ntap-20190327-0005/ third party advisory
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/ vendor advisory
https://www.debian.org/security/2019/dsa-4431 vendor advisory
https://seclists.org/bugtraq/2019/Apr/25 mailing list
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00072.html vendor advisory
https://lists.debian.org/debian-lts-announce/2019/07/msg00028.html mailing list
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

Frequently Asked Questions

What is the severity of CVE-2019-3860?
CVE-2019-3860 has been scored as a medium severity vulnerability.
How to fix CVE-2019-3860?
To fix CVE-2019-3860, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-3860 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-3860 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-3860?
CVE-2019-3860 affects The libssh2 Project libssh2.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.