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    CVE-2017-13098

    BouncyCastle TLS prior to version 1.0.3, when configured to use the JCE (Java Cryptography Extension) for cryptographic functions, provides a weak Bleichenbacher oracle when any TLS cipher suite using RSA key exchange is negotiated. An attacker can recover the private key from a vulnerable application. This vulnerability is referred to as "ROBOT."

    Published:Dec 12, 2017
    Last Modified:May 12, 2025
    EPS:Dec 13, 2017
    EPSS Score:0.7563
    CVSS Score:7.5

    Affected Products

    Vendor
    Bouncycastle
    Product
    Bc-java

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-13586 (CVSS 5.3) — In Bouncy Castle for Java before 1.85, PKCS#12 MAC and bag-decryption KDF iteration-count bound (DoS). This is…
    CVE-2026-13506 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, Lazy ASN.1 sequence forcing resets nesting-depth guard. This issue also…
    CVE-2026-12860 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path.…
    CVE-2026-12852 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, MLS wire decoder allocates attacker-declared opaque length before bound…
    CVE-2026-12817 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, OpenPGP AEAD decryption skips final tag on chunk-aligned data. This iss…
    CVE-2026-12816 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, IESEngine stream-mode MAC forgery via length-dependent KDF split. This …
    CVE-2026-12803 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce…
    CVE-2026-12802 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, CMS AuthEnvelopedData fails to enforce tag-length on decryption. This i…
    CVE-2026-14682 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, Possible OOM from unbounded up-front allocation on a definite-length re…
    CVE-2026-58059 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, Quadratic-time escaping when stringifying X.500 distinguished names. Th…

    References

    http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00011.html
    http://www.kb.cert.org/vuls/id/144389
    http://www.securityfocus.com/bid/102195
    https://github.com/bcgit/bc-java/commit/a00b684465b38d722ca9a3543b8af8568e6bad5c
    https://robotattack.org/
    https://security.netapp.com/advisory/ntap-20171222-0001/
    https://www.debian.org/security/2017/dsa-4072
    https://www.oracle.com/security-alerts/cpuoct2020.html
    http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00011.html
    http://www.kb.cert.org/vuls/id/144389
    http://www.securityfocus.com/bid/102195
    https://github.com/bcgit/bc-java/commit/a00b684465b38d722ca9a3543b8af8568e6bad5c
    https://robotattack.org/
    https://security.netapp.com/advisory/ntap-20171222-0001/
    https://www.debian.org/security/2017/dsa-4072
    https://www.oracle.com/security-alerts/cpuoct2020.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High