{"id":"CVE-2018-15836","aliases":["EUVD-2018-7694","GHSA-3qpc-4533-p5rr"],"status":"published","title":"In verify_signed_hash() in lib/liboswkeys/signatures.c in Openswan before 2.6.50.1, the RSA...","description":"In verify_signed_hash() in lib/liboswkeys/signatures.c in Openswan before 2.6.50.1, the RSA implementation does not verify the value of padding string during PKCS#1 v1.5 signature verification. Consequently, a remote attacker can forge signatures when small public exponents are being used. IKEv2 signature verification is affected when RAW RSA keys are used.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01522,"percentile":0.74788,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-347"],"published":"2018-09-26T21:00:00Z","modified":"2026-10-20T13:29:33Z","products":[{"vendor":"xelerance","product":"openswan"}],"references":[{"url":"https://lists.openswan.org/pipermail/users/2018-August/023761.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Release Notes","Vendor Advisory","advisory"]},{"url":"https://github.com/xelerance/Openswan/commit/9eaa6c2a823c1d2b58913506a15f9474bf857a3d","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","fix"]},{"url":"https://github.com/xelerance/Openswan/commit/0b460be9e287fd335c8ce58129c67bf06065ef51","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-15836"},{"url":"https://github.com/advisories/GHSA-3qpc-4533-p5rr"}],"sources":{"cve":[{"id":"CVE-2018-15836","description":"In verify_signed_hash() in lib/liboswkeys/signatures.c in Openswan before 2.6.50.1, the RSA implementation does not verify the value of padding string during PKCS#1 v1.5 signature verification. Consequently, a remote attacker can forge signatures when small public exponents are being used. IKEv2 signature verification is affected when RAW RSA keys are used.","status":"published","published":"2018-09-26T21:00:00Z","modified":"2024-08-05T10:01:54.675Z","updated_at":"2026-11-02T14:35:03.825765Z"}],"euvd":[{"id":"EUVD-2018-7694","description":"In verify_signed_hash() in lib/liboswkeys/signatures.c in Openswan before 2.6.50.1, the RSA implementation does not verify the value of padding string during PKCS#1 v1.5 signature verification. Consequently, a remote attacker can forge signatures when small public exponents are being used. IKEv2 signature verification is affected when RAW RSA keys are used.","status":"published","published":"2018-09-26T21:00:00Z","modified":"2024-08-05T10:01:54Z","updated_at":"2026-11-03T02:39:43.665553Z"}],"ghsa":[{"id":"GHSA-3qpc-4533-p5rr","title":"In verify_signed_hash() in lib/liboswkeys/signatures.c in Openswan before 2.6.50.1, the RSA...","description":"In verify_signed_hash() in lib/liboswkeys/signatures.c in Openswan before 2.6.50.1, the RSA implementation does not verify the value of padding string during PKCS#1 v1.5 signature verification. Consequently, a remote attacker can forge signatures when small public exponents are being used. IKEv2 signature verification is affected when RAW RSA keys are used.","status":"published","published":"2022-05-14T01:41:56Z","modified":"2023-02-02T05:04:21Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:51:51.17086Z"}],"nvd":[{"id":"CVE-2018-15836","description":"In verify_signed_hash() in lib/liboswkeys/signatures.c in Openswan before 2.6.50.1, the RSA implementation does not verify the value of padding string during PKCS#1 v1.5 signature verification. Consequently, a remote attacker can forge signatures when small public exponents are being used. IKEv2 signature verification is affected when RAW RSA keys are used.","status":"published","published":"2018-09-26T21:29:00.913Z","modified":"2026-06-17T01:43:10.62Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:04:42.52179Z"}],"osv":[{"id":"CVE-2018-15836","description":"In verify_signed_hash() in lib/liboswkeys/signatures.c in Openswan before 2.6.50.1, the RSA implementation does not verify the value of padding string during PKCS#1 v1.5 signature verification. Consequently, a remote attacker can forge signatures when small public exponents are being used. IKEv2 signature verification is affected when RAW RSA keys are used.","status":"published","published":"2018-09-26T21:29:00.913Z","modified":"2026-10-20T13:29:33.397729015Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:08.533609Z"}]}}