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CVE-2015-1798

UnknownEPSS 2.22%

Last modified

CVE-2015-1798 is a vulnerability of currently unknown severity. The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.. EPSS estimates a 2.22% chance of exploitation in the next 30 days.

Description

The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.

Metrics

EPSS Probability
2.22%

80.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
NtpNtp<= 4.2.7p444

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2015-1798?
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.
How severe is CVE-2015-1798?
Severity scoring for CVE-2015-1798 is pending analysis. The EPSS model estimates a 2.22% probability of exploitation in the next 30 days.
How do I fix CVE-2015-1798?
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-2015-1798?

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

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Source: NVD / NIST