CVE-2017-7822

Description

The AES-GCM implementation in WebCrypto API accepts 0-length IV when it should require a length of 1 according to the NIST Special Publication 800-38D specification. This might allow for the authentication key to be determined in some instances. This vulnerability affects Firefox < 56.

5.3

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.61%

Vendor Advisory mozilla.org

Affected: Mozilla Firefox

References

Link	Tags
http://www.securitytracker.com/id/1039465	third party advisory vdb entry
https://www.mozilla.org/security/advisories/mfsa2017-21/	vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1368859	issue tracking
http://www.securityfocus.com/bid/101057	third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2017-7822?: CVE-2017-7822 has been scored as a medium severity vulnerability.
How to fix CVE-2017-7822?: To fix CVE-2017-7822, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-7822 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2017-7822 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-7822?: CVE-2017-7822 affects Mozilla Firefox.

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