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Public proof of conceptFix available

CVE-2017-13099

A public proof of concept exists; no exploitation attested.

  • Published2017-12-13
  • Fixed in3.12.2
  • WeaknessCWE-203

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

wolfSSL prior to version 3.12.2 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 wolfSSL application. This vulnerability is referred to as "ROBOT."

Timeline

dates in UTC
  1. 2017-12-1301:29CVE publishedNVD
  2. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Versions per branch

NVD
Wolfssl
BranchAffectedFixed in
3.12< 3.12.23.12.2
Arubanetworks instant
BranchAffectedFixed in
6.5< 6.5.4.66.5.4.6
Siemens scalance w1750d firmwareversion to verify
BranchAffectedFixed in
8.3< 8.3.0.18.3.0.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • wolfsslUbuntu:16.04:LTSall versions · no fixed version listed
  • wolfsslDebian:13all versions · fixed in 3.13.0+dfsg-1
  • wolfsslDebian:12all versions · fixed in 3.13.0+dfsg-1

Vendor advisories

  • ICSA-18-282-02 CISA1 known affected

    ICSA-18-282-02 Siemens SCALANCE W1750D

    SCALANCE W1750D

Full record on NVD

Fix

  1. Update Wolfssl to 3.12.2
  2. Vendor fix CISA ICSA-18-282-02 · 1 productUpdate to V8.3.0.1 - Download: https://support.industry.siemens.com/cs/us/en/view/109760581
  3. Mitigation from the vendor CISA ICSA-18-282-02 · 1 productSiemens has identified the following specific workarounds and mitigations thatcustomers can apply to reduce the risk: Restrict access to the web interface of the affected devices.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
1 moduleauxiliary/scanner/ssl/bleichenbacher_oraclerank: normalModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

  • CNACVSS 3.07.5known since 2026-10-23
  • NVDCVSS 3.05.9read 2026-10-23
  • NVDCVSS 2.04.3read 2026-10-23
  • CNAweakness (CWE)CWE-203known since 2026-10-23
  • NVDweakness (CWE)CWE-203read 2026-10-23
  • FIRST EPSSEPSS score27.4 %read 2026-11-09
  • Metasploit FrameworkMetasploit modules1known since 2026-11-01
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2017-12-13
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-97gp-82pc-qc6x

Frequently asked questions

What is CVE-2017-13099?

wolfSSL prior to version 3.12.2 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 wolfSSL application. This vulnerability is referred to as "ROBOT."

Is CVE-2017-13099 actively exploited?

Active exploitation of CVE-2017-13099 has not been confirmed. Its EPSS score was 27.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-13099?

CVE-2017-13099 has a CVSS v3 base score of 5.9 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

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