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CVE-2019-13115

31
FAUCET Score

CVE-2019-13115 is an integer overflow vulnerability in libssh2 versions prior to 1.9.0, specifically affecting the kex.c file, which can lead to an out-of-bounds read. This flaw impacts products like Debian, F5, Fedora Project, and NetApp. Rated with a CVSS score of 8.1 (HIGH), a remote attacker can exploit this by compromising an SSH server, potentially disclosing sensitive client information or causing a denial of service when a user connects. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.9.0CPE 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:*:*:*:*:*:*:*
29CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
30CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
11.66%
Probability of exploitation in next 30 days
EPSS Percentile
95.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.1166 is in the 96th percentile among its peer group of 14,824 CVEs.

Social Chatter

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.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Vendor Patches (2)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libssh2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8 Advanced VirtualizationFixed in: virt:8.0.0/libssh2

Vendor Advisories (1)

redhatCVE-2019-13115Moderate

libssh2: integer overflow in kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c leads to out-of-bounds write

Jul 16, 2019

References

packetstormsecurity.com / files/172834/libssh2-1.8.2-Out-Of-Bounds-Read.html
blog.semmle.com / libssh2-integer-overflow
ExploitThird Party Advisory
github.com / libssh2/libssh2/compare/02ecf17...42d37aa
Third Party Advisory
github.com / libssh2/libssh2/pull/350
Issue TrackingThird Party Advisory
libssh2.org / changes.html
Release NotesVendor Advisory
lists.apache.org / thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org / thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
lists.debian.org / debian-lts-announce/2019/07/msg00024.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2021/12/msg00013.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2023/09/msg00006.html
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/6LUNHPW64IGCASZ4JQ2J5KDXNZN53DWW
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/M7IF3LNHOA75O4WZWIHJLIRMA5LJUED3
security.netapp.com / advisory/ntap-20190806-0002
Third Party Advisory
support.f5.com / csp/article/K13322484
Third Party Advisory
support.f5.com / csp/article/K13322484