Buffer overflow in Libssh2
CVE-2019-3856
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…
Vulnerability class: Integer Overflow
EPSS: 0.061 (92.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Libssh2
- Netapp Ontap_select_deploy_administration_utility
- Oracle Peoplesoft_enterprise_peopletools — versions 8.56, 8.57
- The Libssh2 Project — versions 1.8.1
- Debian Debian_linux — versions 8.0, 9.0
- Fedoraproject Fedora — versions 28
- Opensuse Leap — versions 15.0, 42.3
- Redhat Enterprise_linux — versions 8.0
- Redhat Enterprise_linux_desktop — versions 7.0
- Redhat Enterprise_linux_server — versions 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, x_refsource_MISC, Vendor Advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Patch, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (mailing-list, x_refsource_MLIST, Third Party Advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_SUSE)
- secalert@redhat.com (x_refsource_FEDORA, vendor-advisory)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- secalert@redhat.com (mailing-list, x_refsource_BUGTRAQ, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-3856?
- CVE-2019-3856 is a high-severity vulnerability in Libssh2, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2019-03-25.
- How severe is CVE-2019-3856?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2019-3856 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.