CVE-2019-13115
high-risk
Published 2019-07-16
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.
Do I need to act?
!
42.8% chance of exploitation in next 30 days
EPSS score — higher than 57% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.1/10
High
NETWORK
/ LOW complexity
Affected Products (9)
Affected Vendors
References (30)
Third Party Advisory
https://github.com/libssh2/libssh2/compare/02ecf17...42d37aa
Issue Tracking
https://github.com/libssh2/libssh2/pull/350
Release Notes
https://libssh2.org/changes.html
Third Party Advisory
https://security.netapp.com/advisory/ntap-20190806-0002/
Third Party Advisory
https://support.f5.com/csp/article/K13322484
Third Party Advisory
https://github.com/libssh2/libssh2/compare/02ecf17...42d37aa
Issue Tracking
https://github.com/libssh2/libssh2/pull/350
Release Notes
https://libssh2.org/changes.html
and 10 more references
60
/ 100
high-risk
Severity
28/34 · Critical
Exploitability
17/34 · Moderate
Exposure
15/34 · Moderate