Out-of-bounds Read in Libssh2
CVE-2019-3859
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.063 (93.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.063 · newest: 0.063 · change: 0.000
Affected products
- Libssh2
- NetApp Ontap Select Deploy Administration Utility
- The Libssh2 Project — versions 1.8.1
- Debian Linux — versions 8.0, 9.0
- Fedoraproject Fedora — versions 28, 29
- openSUSE Leap — versions 15.0, 42.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2019/03/18/3 (mailing-list, Patch, Mailing List, Third Party Advisory)
- seclists.org/bugtraq/2019/Mar/25 (mailing-list, Patch, Mailing List, Third Party Advisory)
- www.libssh2.org/CVE-2019-3859.html (Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Update… (Patch, VDB Entry, Third Party Advisory)
- www.securityfocus.com/bid/107485 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-s… (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/03/msg00032.html (mailing-list, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20190327-0005/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2019-3859?
- CVE-2019-3859 is a critical-severity vulnerability in Libssh2, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2019-03-21.
- How severe is CVE-2019-3859?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2019-3859 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.