CVE-2019-3857 is an integer overflow vulnerability in libssh2 versions prior to 1.8.1, affecting products like Debian, Fedora, and Red Hat. This flaw, triggered by malformed SSH_MSG_CHANNEL_REQUEST packets, could allow a compromised SSH server to execute code on a connecting client system. With a CVSS score of 8.8 (High), it presents a significant risk due to its network-based attack vector and high impact on confidentiality, integrity, and availability, requiring user interaction. While no public exploit code (Metasploit, Nuclei, ExploitDB) is currently available and it's not listed in the KEV catalog, there has been some community discussion and media coverage, indicating awareness of the vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.2.8, <= 1.8.0CPE matchmatch criteria | cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:* | ||
8.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* | ||
15.0CPE matchmatch criteria | cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.