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CVE-2016-0739

UnknownEPSS 2.43%

Last modified

CVE-2016-0739 is a vulnerability of currently unknown severity. libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug.". EPSS estimates a 2.43% chance of exploitation in the next 30 days.

Description

libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."

Metrics

EPSS Probability
2.43%

82.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
RedhatEnterprise Linux7.0
CanonicalUbuntu Linux12.04
CanonicalUbuntu Linux14.04
CanonicalUbuntu Linux15.10
LibsshLibssh<= 0.7.2
FedoraprojectFedora22
FedoraprojectFedora23
DebianDebian Linux7.0
DebianDebian Linux8.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2016-0739?
libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."
How severe is CVE-2016-0739?
Severity scoring for CVE-2016-0739 is pending analysis. The EPSS model estimates a 2.43% probability of exploitation in the next 30 days.
How do I fix CVE-2016-0739?
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-2016-0739?

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

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Source: NVD / NIST