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 2017-12-13 01:29:00
Updated 2020-10-20 22:15:20
Source CERT/CC
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2017-13098

0.56%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 75 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2017-13098

  • Scanner for Bleichenbacher Oracle in RSA PKCS #1 v1.5
    Disclosure Date: 2009-06-17
    First seen: 2020-04-26
    auxiliary/scanner/ssl/bleichenbacher_oracle
    Some TLS implementations handle errors processing RSA key exchanges and encryption (PKCS #1 v1.5 messages) in a broken way that leads an adaptive chosen-chiphertext attack. Attackers cannot recover a server's private key, but they can decrypt and sign messages with i

CVSS scores for CVE-2017-13098

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
MEDIUM AV:N/AC:M/Au:N/C:P/I:N/A:N
8.6
2.9
NIST
7.5
HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.9
3.6
CERT/CC
5.9
MEDIUM CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
2.2
3.6
NIST

CWE ids for CVE-2017-13098

  • The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.
    Assigned by:
    • cret@cert.org (Secondary)
    • nvd@nist.gov (Primary)

References for CVE-2017-13098

Products affected by CVE-2017-13098

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