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Chunk extensions are a little-used HTTP feature which permit including additional metadata in a request or response body sent using the chunked encoding. The net/http chunked encoding reader discards this metadata. A sender can exploit this by inserting a large metadata segment with each byte transferred. The chunk reader now produces an error if the ratio of real body to encoded bytes grows too 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Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective. In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits. In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-45287.json","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-45287.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-45287","reference_id":"","reference_type":"","scores":[{"value":"0.00185","scoring_system":"epss","scoring_elements":"0.40124","published_at":"2026-06-05T12:55:00Z"},{"value":"0.00185","scoring_system":"epss","scoring_elements":"0.40127","published_at":"2026-06-06T12:55:00Z"},{"value":"0.00185","scoring_system":"epss","scoring_elements":"0.40099","published_at":"2026-06-07T12:55:00Z"},{"value":"0.00185","scoring_system":"epss","scoring_elements":"0.40071","published_at":"2026-06-08T12:55:00Z"},{"value":"0.00185","scoring_system":"epss","scoring_elements":"0.40088","published_at":"2026-06-09T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-45287"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45287","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45287"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2253193","reference_id":"2253193","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2253193"},{"reference_url":"https://access.redhat.com/errata/RHSA-2023:7200","reference_id":"RHSA-2023:7200","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2023:7200"},{"reference_url":"https://access.redhat.com/errata/RHSA-2023:7201","reference_id":"RHSA-2023:7201","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2023:7201"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:0269","reference_id":"RHSA-2024:0269","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:0269"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:0281","reference_id":"RHSA-2024:0281","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:0281"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:0748","reference_id":"RHSA-2024:0748","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:0748"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:1078","reference_id":"RHSA-2024:1078","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:1078"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:1859","reference_id":"RHSA-2024:1859","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:1859"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:1901","reference_id":"RHSA-2024:1901","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:1901"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:2180","reference_id":"RHSA-2024:2180","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:2180"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:2193","reference_id":"RHSA-2024:2193","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:2193"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:2239","reference_id":"RHSA-2024:2239","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:2239"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:2245","reference_id":"RHSA-2024:2245","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:2245"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:2272","reference_id":"RHSA-2024:2272","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:2272"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:2988","reference_id":"RHSA-2024:2988","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:2988"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:3316","reference_id":"RHSA-2024:3316","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:3316"},{"reference_url":"https://access.redhat.com/errata/RHSA-2024:4429","reference_id":"RHSA-2024:4429","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2024:4429"}],"fixed_packages":[],"aliases":["CVE-2023-45287"],"risk_score":3.4,"exploitability":"0.5","weighted_severity":"6.8","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-r6y5-1w4a-3fe5"}],"fixing_vulnerabilities":[],"risk_score":"3.4","resource_url":"http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/buildah@2:1.33.6-2%3Farch=el9"}