{"id":"CVE-2013-4576","aliases":["CLSA-2023-1698945053","CLSA-2026-1782731604","DEBIAN-CVE-2013-4576","DSA-2821-1","EUVD-2013-4434","GHSA-f43f-q929-x2qf","MGASA-2013-0382","RHSA-2014:0016"],"status":"published","title":"GnuPG 1.x before 1.4.16 generates RSA keys using sequences of introductions with certain patterns...","description":"GnuPG 1.x before 1.4.16 generates RSA keys using sequences of introductions with certain patterns that introduce a side channel, which allows physically proximate attackers to extract RSA keys via a chosen-ciphertext attack and acoustic cryptanalysis during decryption. NOTE: applications are not typically expected to protect themselves from acoustic side-channel attacks, since this is arguably the responsibility of the physical device. Accordingly, issues of this type would not normally receive a CVE identifier. However, for this issue, the developer has specified a security policy in which GnuPG should offer side-channel resistance, and developer-specified security-policy violations are within the scope of CVE.","severity":{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.00451,"percentile":0.39444,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-255"],"published":"2013-12-18T00:00:00Z","modified":"2026-10-26T09:43:35Z","fixes":[{"ecosystem":"Debian:6.0","package":"gnupg","fixed_in":["1.4.10-4+squeeze4"],"sources":["osv"]},{"ecosystem":"Debian:7","package":"gnupg","fixed_in":["1.4.12-7+deb7u3"],"sources":["osv"]},{"ecosystem":"Mageia:3","package":"gnupg","fixed_in":["1.4.14-1.2.mga3"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:5::client","package":"gnupg","fixed_in":["0:1.4.5-18.el5_10.1"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:5::client","package":"gnupg-debuginfo","fixed_in":["0:1.4.5-18.el5_10.1"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:5::server","package":"gnupg","fixed_in":["0:1.4.5-18.el5_10.1"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:5::server","package":"gnupg-debuginfo","fixed_in":["0:1.4.5-18.el5_10.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"TuxCare:CentOS:7","package":"libgcrypt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.3-14.el7.tuxcare.els1"}]}],"bundled":4},{"source":"osv","ecosystem":"TuxCare:CentOS:7","package":"libgcrypt-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.3-14.el7.tuxcare.els1"}]}],"bundled":4},{"source":"osv","ecosystem":"TuxCare:OracleLinux:7","package":"libgcrypt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.3-14.el7.tuxcare.els1"}]}],"bundled":4},{"source":"osv","ecosystem":"TuxCare:OracleLinux:7","package":"libgcrypt-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.3-14.el7.tuxcare.els1"}]}],"bundled":4},{"source":"osv","ecosystem":"Debian:6.0","package":"gnupg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.10-4+squeeze4"}]}],"versions":["1.4.10-4","1.4.10-4+squeeze1","1.4.10-4+squeeze2","1.4.10-4+squeeze3"]},{"source":"osv","ecosystem":"Debian:7","package":"gnupg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.12-7+deb7u3"}]}],"versions":["1.4.12-7","1.4.12-7+deb7u1","1.4.12-7+deb7u2"]},{"source":"osv","ecosystem":"Mageia:3","package":"gnupg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.14-1.2.mga3"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::client","package":"gnupg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.4.5-18.el5_10.1"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::client","package":"gnupg-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.4.5-18.el5_10.1"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::server","package":"gnupg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.4.5-18.el5_10.1"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::server","package":"gnupg-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.4.5-18.el5_10.1"}]}]}],"products":[{"vendor":"gnupg","product":"gnupg"}],"references":[{"url":"http://www.securityfocus.com/bid/64424","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.ubuntu.com/usn/USN-2059-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred"]},{"url":"http://osvdb.org/101170","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"http://lists.gnupg.org/pipermail/gnupg-devel/2013-December/028102.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Patch","Vendor Advisory","web"]},{"url":"http://rhn.redhat.com/errata/RHSA-2014-0016.html","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"url":"http://www.securitytracker.com/id/1029513","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/89846","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.debian.org/security/2013/dsa-2821","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","web"]},{"url":"http://www.tau.ac.il/~tromer/papers/acoustic-20131218.pdf","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://seclists.org/oss-sec/2013/q4/523","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"http://www.cs.tau.ac.il/~tromer/acoustic/","tags":["x_refsource_MISC","x_transferred","article"]},{"url":"http://seclists.org/oss-sec/2013/q4/520","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-4576","tags":["advisory"]},{"url":"http://www.cs.tau.ac.il/~tromer/acoustic"},{"url":"https://github.com/advisories/GHSA-f43f-q929-x2qf"},{"url":"https://errata.cloudlinux.com/centos7-els/CLSA-2023-1698945053.html","tags":["advisory"]},{"url":"https://errata.tuxcare.com/els_os/oraclelinux7els/CLSA-2026-1782731604.html","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33560","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2013-0382.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=12039","tags":["report"]},{"url":"https://access.redhat.com/errata/RHSA-2014:0016","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#moderate","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1043327","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2014/rhsa-2014_0016.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2013-4576","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2013-4576","tags":["advisory"]},{"url":"http://lists.gnupg.org/pipermail/gnupg-announce/2013q4/000337.html","tags":["article"]}],"sources":{"cve":[{"id":"CVE-2013-4576","description":"GnuPG 1.x before 1.4.16 generates RSA keys using sequences of introductions with certain patterns that introduce a side channel, which allows physically proximate attackers to extract RSA keys via a chosen-ciphertext attack and acoustic cryptanalysis during decryption. NOTE: applications are not typically expected to protect themselves from acoustic side-channel attacks, since this is arguably the responsibility of the physical device. Accordingly, issues of this type would not normally receive a CVE identifier. However, for this issue, the developer has specified a security policy in which GnuPG should offer side-channel resistance, and developer-specified security-policy violations are within the scope of CVE.","status":"published","published":"2013-12-20T21:00:00Z","modified":"2024-08-06T16:45:14.839Z","updated_at":"2026-11-02T14:34:57.869657Z"}],"euvd":[{"id":"EUVD-2013-4434","description":"GnuPG 1.x before 1.4.16 generates RSA keys using sequences of introductions with certain patterns that introduce a side channel, which allows physically proximate attackers to extract RSA keys via a chosen-ciphertext attack and acoustic cryptanalysis during decryption. NOTE: applications are not typically expected to protect themselves from acoustic side-channel attacks, since this is arguably the responsibility of the physical device. Accordingly, issues of this type would not normally receive a CVE identifier. However, for this issue, the developer has specified a security policy in which GnuPG should offer side-channel resistance, and developer-specified security-policy violations are within the scope of CVE.","status":"published","published":"2013-12-20T21:00:00Z","modified":"2024-08-06T16:45:14Z","updated_at":"2026-11-03T01:56:31.067159Z"}],"ghsa":[{"id":"GHSA-f43f-q929-x2qf","title":"GnuPG 1.x before 1.4.16 generates RSA keys using sequences of introductions with certain patterns...","description":"GnuPG 1.x before 1.4.16 generates RSA keys using sequences of introductions with certain patterns that introduce a side channel, which allows physically proximate attackers to extract RSA keys via a chosen-ciphertext attack and acoustic cryptanalysis during decryption. NOTE: applications are not typically expected to protect themselves from acoustic side-channel attacks, since this is arguably the responsibility of the physical device. Accordingly, issues of this type would not normally receive a CVE identifier. However, for this issue, the developer has specified a security policy in which GnuPG should offer side-channel resistance, and developer-specified security-policy violations are within the scope of CVE.","status":"published","published":"2022-05-17T01:33:03Z","modified":"2025-04-11T04:18:20Z","updated_at":"2026-11-02T15:01:15.391359Z"}],"nvd":[{"id":"CVE-2013-4576","description":"GnuPG 1.x before 1.4.16 generates RSA keys using sequences of introductions with certain patterns that introduce a side channel, which allows physically proximate attackers to extract RSA keys via a chosen-ciphertext attack and acoustic cryptanalysis during decryption. NOTE: applications are not typically expected to protect themselves from acoustic side-channel attacks, since this is arguably the responsibility of the physical device. Accordingly, issues of this type would not normally receive a CVE identifier. However, for this issue, the developer has specified a security policy in which GnuPG should offer side-channel resistance, and developer-specified security-policy violations are within the scope of CVE.","status":"published","published":"2013-12-20T21:55:06.93Z","modified":"2026-06-16T23:57:28.957Z","cvss":[{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-255"],"updated_at":"2026-11-02T14:02:44.596064Z"}],"osv":[{"id":"CLSA-2023-1698945053","title":"libgcrypt: Fix of 4 CVEs","description":"- CVE-2013-4576: Normalize the MPIs to prevent possible side-channel\n  attacks\n- CVE-2014-3591: Use ciphertext blinding for Elgamal to prevent\n  possible side-channel attacks\n- CVE-2021-33560: Use of smaller K for ephemeral key in ElGamal\n  prevent generation of weak keys\n- CVE-2021-40528: Add exponent blinding as well to mitigate\n  side-channel attack on mpi_powm\n- tests: Add a benchmark for Elgamal","status":"published","published":"2023-11-02T17:10:57Z","modified":"2026-06-01T00:33:17.284256741Z","updated_at":"2026-11-02T15:43:40.509998Z"},{"id":"CLSA-2026-1782731604","title":"libgcrypt: Fix of CVE-2021-33560","description":"- CVE-2013-4576: Normalize the MPIs to prevent possible side-channel\n  attacks\n- CVE-2014-3591: Use ciphertext blinding for Elgamal to prevent\n  possible side-channel attacks\n- CVE-2021-33560: Use of smaller K for ephemeral key in ElGamal\n  prevent generation of weak keys\n- CVE-2021-40528: Add exponent blinding as well to mitigate\n  side-channel attack on mpi_powm\n- tests: Add a benchmark for Elgamal","status":"published","published":"2026-06-29T11:13:40Z","modified":"2026-10-26T09:43:35.904800852Z","updated_at":"2026-11-02T15:43:45.794021Z"},{"id":"DSA-2821-1","title":"gnupg - side channel attack","status":"published","published":"2013-12-18T00:00:00Z","modified":"2026-03-09T01:17:57.045951Z","updated_at":"2026-11-02T15:46:15.843838Z"},{"id":"MGASA-2013-0382","title":"Updated gnupg package fixes CVE-2013-4576","description":"Updated gnupg package fixes security vulnerability:\n\nGenkin, Shamir and Tromer discovered that RSA key material could be extracted\nby using the sound generated by the computer during the decryption of some\nchosen ciphertexts (CVE-2013-4576).\n","status":"published","published":"2013-12-20T17:29:34Z","modified":"2026-04-16T06:26:09.98803431Z","updated_at":"2026-11-02T15:49:39.121227Z"},{"id":"RHSA-2014:0016","title":"Red Hat Security Advisory: gnupg security update","status":"published","published":"2024-09-15T21:16:09Z","modified":"2026-06-26T10:23:11Z","updated_at":"2026-11-02T15:53:01.993625Z"}]}}