CVE-2019-13115
In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to…
- 8.1HighCVSS base score
- 11.7%Exploitation in 30 daysEPSS · top 3.9% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855.
Timeline
ID reserved
By mitre
- 16 days later
· 16 days later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 11.7% · top 3.9% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Affected products
n/a
- affected n/a
References
References15
- https://github.com/libssh2/libssh2/pull/350 (opens in a new tab)x_transferred
- https://libssh2.org/changes.html (opens in a new tab)x_transferred
- https://github.com/libssh2/libssh2/compare/02ecf17...42d37aa (opens in a new tab)x_transferred
- https://blog.semmle.com/libssh2-integer-overflow/ (opens in a new tab)x_transferred
- [debian-lts-announce] 20190725 [SECURITY] [DLA 1730-3] libssh2 regression update (opens in a new tab)mailing-listx_transferred
- FEDORA-2019-9d85600fc7 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2019-5885663621 (opens in a new tab)vendor-advisoryx_transferred
- https://security.netapp.com/advisory/ntap-20190806-0002/ (opens in a new tab)x_transferred
- https://support.f5.com/csp/article/K13322484 (opens in a new tab)x_transferred
- https://support.f5.com/csp/article/K13322484?utm_source=f5support&%3Butm_medium=RSS (opens in a new tab)x_transferred
- [bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 (opens in a new tab)mailing-listx_transferred
- [bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 (opens in a new tab)mailing-listx_transferred
- [debian-lts-announce] 20211217 [SECURITY] [DLA 2848-1] libssh2 security update (opens in a new tab)mailing-listx_transferred
- http://packetstormsecurity.com/files/172834/libssh2-1.8.2-Out-Of-Bounds-Read.html (opens in a new tab)x_transferred
- [debian-lts-announce] 20230908 [SECURITY] [DLA 3559-1] libssh2 security update (opens in a new tab)mailing-listx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-4656 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-13115)Record last updated .