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{"acknowledgement": "Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Martin Thomson as the original reporter.", "affected_release": [{"advisory": "RHSA-2017:2832", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "nss-0:3.28.4-4.el6_9", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2017-09-28T00:00:00Z"}, {"advisory": "RHSA-2017:2832", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "nss-0:3.28.4-12.el7_4", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2017-09-28T00:00:00Z"}], "bugzilla": {"description": "nss: Potential use-after-free in TLS 1.2 server when verifying client authentication", "id": "1471171", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1471171"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.", "A use-after-free flaw was found in the TLS 1.2 implementation in the NSS library when client authentication was used. A malicious client could use this flaw to cause an application compiled against NSS to crash or, potentially, execute arbitrary code with the permission of the user running the application."], "name": "CVE-2017-7805", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "nss", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2017-09-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-7805\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-7805"], "threat_severity": "Important"}