Buffer overflow in Libssh2
CVE-2019-3857
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Vulnerability class: Integer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.061 (93.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.061 · newest: 0.061 · change: 0.000
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 Linux — versions 8.0, 9.0
- Fedoraproject Fedora — versions 28
- openSUSE Leap — versions 15.0, 42.3
- Red Hat Enterprise Linux — versions 8.0
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Server — versions 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- www.libssh2.org/CVE-2019-3857.html (Patch, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2019/03/msg00032.html (mailing-list, Third Party Advisory)
- security.netapp.com/advisory/ntap-20190327-0005/ (Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:0679 (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.debian.org/security/2019/dsa-4431 (vendor-advisory, Third Party Advisory)
- seclists.org/bugtraq/2019/Apr/25 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-3857?
- CVE-2019-3857 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-2019-3857?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2019-3857 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.