Strix
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CVE-2016-2849

UnknownEPSS 2.46%

Last modified

CVE-2016-2849 is a vulnerability of currently unknown severity. Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret keys via a timing side-channel attack.. EPSS estimates a 2.46% chance of exploitation in the next 30 days.

Description

Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret keys via a timing side-channel attack.

Metrics

EPSS Probability
2.46%

82.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
DebianDebian Linux8.0
FedoraprojectFedora24
Botan ProjectBotan1.10.12
Botan ProjectBotan1.11.0
Botan ProjectBotan1.11.1
Botan ProjectBotan1.11.2
Botan ProjectBotan1.11.3
Botan ProjectBotan1.11.4
Botan ProjectBotan1.11.5
Botan ProjectBotan1.11.6
Botan ProjectBotan1.11.7
Botan ProjectBotan1.11.8
Botan ProjectBotan1.11.9
Botan ProjectBotan1.11.10
Botan ProjectBotan1.11.11
Botan ProjectBotan1.11.12
Botan ProjectBotan1.11.13
Botan ProjectBotan1.11.14
Botan ProjectBotan1.11.15
Botan ProjectBotan1.11.16
Botan ProjectBotan1.11.17
Botan ProjectBotan1.11.18
Botan ProjectBotan1.11.19
Botan ProjectBotan1.11.20
Botan ProjectBotan1.11.21
Botan ProjectBotan1.11.22
Botan ProjectBotan1.11.23
Botan ProjectBotan1.11.24
Botan ProjectBotan1.11.25
Botan ProjectBotan1.11.26
Botan ProjectBotan1.11.27
Botan ProjectBotan1.11.28

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2016-2849?
Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret keys via a timing side-channel attack.
How severe is CVE-2016-2849?
Severity scoring for CVE-2016-2849 is pending analysis. The EPSS model estimates a 2.46% probability of exploitation in the next 30 days.
How do I fix CVE-2016-2849?
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-2016-2849?

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

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Source: NVD / NIST