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.
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{ "binaries": [ { "binary_version": "56.0+build6-0ubuntu0.16.04.1", "binary_name": "firefox" }, { "binary_version": "56.0+build6-0ubuntu0.16.04.1", "binary_name": "firefox-dev" }, { "binary_version": "56.0+build6-0ubuntu0.16.04.1", "binary_name": "firefox-globalmenu" }, { "binary_version": "56.0+build6-0ubuntu0.16.04.1", "binary_name": "firefox-mozsymbols" }, { "binary_version": "56.0+build6-0ubuntu0.16.04.1", "binary_name": "firefox-testsuite" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_version": "56.0+build6-0ubuntu1", "binary_name": "firefox" }, { "binary_version": "56.0+build6-0ubuntu1", "binary_name": "firefox-dev" }, { "binary_version": "56.0+build6-0ubuntu1", "binary_name": "firefox-globalmenu" }, { "binary_version": "56.0+build6-0ubuntu1", "binary_name": "firefox-mozsymbols" }, { "binary_version": "56.0+build6-0ubuntu1", "binary_name": "firefox-testsuite" } ], "availability": "No subscription required" }