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CVE-2019-13115

HIGHCVSS 8.1/10EPSS 11.66%

Last modified

CVE-2019-13115 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 11.66% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.1/10

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

EPSS Probability
11.66%

95.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Libssh2Libssh2< 1.9.0
DebianDebian Linux8.0
DebianDebian Linux9.0
FedoraprojectFedora29
FedoraprojectFedora30
NetappCloud BackupAll versions
NetappE-Series Santricity Os Controller>= 11.0.0, <= 11.70.1
NetappOntap Select Deploy Administration UtilityAll versions
F5Traffix Systems Signaling Delivery Controller>= 5.0.0, <= 5.1.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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 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.
How severe is CVE-2019-13115?
CVE-2019-13115 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 11.66% probability of exploitation in the next 30 days.
How do I fix CVE-2019-13115?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-13115?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST