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{"acknowledgement": "Red Hat would like to thank the Libgcrypt project for reporting this issue.", "bugzilla": {"description": "libgcrypt: Use of left-to-right sliding window method allows full RSA key recovery", "id": "1466265", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1466265"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-200", "details": ["libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used."], "name": "CVE-2017-7526", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "libgcrypt", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Will not fix", "package_name": "libgcrypt", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "libgcrypt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_linux:7::hypervisor", "fix_state": "Will not fix", "package_name": "mingw-virt-viewer", "product_name": "Red Hat Enterprise Virtualization 3"}], "public_date": "2017-06-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-7526\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-7526\nhttps://eprint.iacr.org/2017/627\nhttps://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html"], "statement": "This side-channel attack requires that the attacker can run arbitrary software on the hardware where the private RSA key is used. Allowing execute access to a box with private keys should be considered as an unsafe security practice, anyway. Thus in practice there are easier ways to access the private keys than to mount this side-channel attack. However, on boxes with virtual machines this attack may be used by one VM to steal private keys from another VM.", "threat_severity": "Moderate", "upstream_fix": "libgcrypt 1.7.8"}