CVE-2016-2181

UnknownEPSS 22.63%

Last modified

CVE-2016-2181 is a vulnerability of currently unknown severity. The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c.. EPSS estimates a 22.63% chance of exploitation in the next 30 days.

Description

The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c.

Metrics

EPSS Probability
22.63%

97.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
OpensslOpenssl1.0.1
OpensslOpenssl1.0.1a
OpensslOpenssl1.0.1b
OpensslOpenssl1.0.1c
OpensslOpenssl1.0.1d
OpensslOpenssl1.0.1e
OpensslOpenssl1.0.1f
OpensslOpenssl1.0.1g
OpensslOpenssl1.0.1h
OpensslOpenssl1.0.1i
OpensslOpenssl1.0.1j
OpensslOpenssl1.0.1k
OpensslOpenssl1.0.1l
OpensslOpenssl1.0.1m
OpensslOpenssl1.0.1n
OpensslOpenssl1.0.1o
OpensslOpenssl1.0.1p
OpensslOpenssl1.0.1q
OpensslOpenssl1.0.1r
OpensslOpenssl1.0.1s
OpensslOpenssl1.0.1t
OpensslOpenssl1.0.2
OpensslOpenssl1.0.2a
OpensslOpenssl1.0.2b
OpensslOpenssl1.0.2c
OpensslOpenssl1.0.2d
OpensslOpenssl1.0.2e
OpensslOpenssl1.0.2f
OpensslOpenssl1.0.2g
OpensslOpenssl1.0.2h
OracleLinux6
OracleLinux7

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2016-2181?
The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c.
How severe is CVE-2016-2181?
Severity scoring for CVE-2016-2181 is pending analysis. The EPSS model estimates a 22.63% probability of exploitation in the next 30 days.
How do I fix CVE-2016-2181?
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-2016-2181?

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

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Source: NVD / NIST