GHSA-574f-3g2m-x479
Dashboard / Vulnerabilities / GHSA-574f-3g2m-x479
Summary: Bouncy Castle for Java GOST 28147 CTR mode reuses keystream after 255 blocks
Details: The GOST 28147-2015 CTR mode implementation (`G3413CTRBlockCipher`) in the Legion of the Bouncy Castle BC-JAVA `bcprov` core module only increments the final byte of the counter, so the counter wraps after 255 blocks and the keystream is reused. Reusing CTR keystream allows an attacker who can observe two ciphertexts produced with the same key/IV to recover the XOR of the plaintexts, breaking confidentiality. Affects BC-JAVA from 1.59 before 1.84 (with backported fixes in 1.80.2 and 1.81.1).
References: https://nvd.nist.gov/vuln/detail/CVE-2025-14813, https://github.com/bcgit/bc-java/commit/b42574345414e4b7c8051b16fa1fafe01c29871f, https://github.com/bcgit/bc-java/commit/701686cb0184cd9ae103c801b3581fdf95c6d4f3, https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-14813.json, https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902025%E2%80%9014813, https://github.com/bcgit/bc-java, https://bugzilla.redhat.com/show_bug.cgi?id=2458640, https://access.redhat.com/security/cve/CVE-2025-14813, https://access.redhat.com/errata/RHSA-2026:24977, https://access.redhat.com/errata/RHSA-2026:21772, https://access.redhat.com/errata/RHSA-2026:18059, https://access.redhat.com/errata/RHSA-2026:18055, https://access.redhat.com/errata/RHSA-2026:18054, https://access.redhat.com/errata/RHSA-2026:17668, https://access.redhat.com/errata/RHSA-2026:14276, https://access.redhat.com/errata/RHSA-2026:14272, https://access.redhat.com/errata/RHSA-2026:13631, https://access.redhat.com/errata/RHSA-2026:11721, https://access.redhat.com/errata/RHSA-2026:11720
Affected packages
Package
Name: org.bouncycastle:bcprov-jdk14
Purl: pkg:maven/org.bouncycastle/bcprov-jdk14
Affected ranges
Type: ECOSYSTEM
Events:
