HOMEVULNERABILITIESCVE-2015-5738
HIGH

CVE-2015-5738

CWE-200Published: July 26, 2016· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

The RSA-CRT implementation in the Cavium Software Development Kit (SDK) 2.x, when used on OCTEON II CN6xxx Hardware on Linux to support TLS with Perfect Forward Secrecy (PFS), makes it easier for remote attackers to obtain private RSA keys by conducting a Lenstra side-channel attack.

NVD Source

Technical Analysis

CVE-2015-5738 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

f51 product(s)
traffix signaling delivery controller
marvell4 product(s)
software development kitocteon ii cn6000octeon ii cn6010octeon ii cn6020
Source: NVD CPE · 5 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://people.redhat.com/~fweimer/rsa-crt-leaks.pdf
ADVISORYhttps://support.f5.com/kb/en-us/solutions/public/k/91/sol91245485.html
ADVISORYhttps://people.redhat.com/~fweimer/rsa-crt-leaks.pdf
ADVISORYhttps://support.f5.com/kb/en-us/solutions/public/k/91/sol91245485.html

All References (6)

→
http://fortiguard.com/advisory/rsa-crt-key-leak-under-certain-conditionsBroken Link
→
https://people.redhat.com/~fweimer/rsa-crt-leaks.pdfTechnical Description · Third Party Advisory
→
https://support.f5.com/kb/en-us/solutions/public/k/91/sol91245485.htmlThird Party Advisory
→
http://fortiguard.com/advisory/rsa-crt-key-leak-under-certain-conditionsBroken Link
→
https://people.redhat.com/~fweimer/rsa-crt-leaks.pdfTechnical Description · Third Party Advisory
→
https://support.f5.com/kb/en-us/solutions/public/k/91/sol91245485.htmlThird Party Advisory

Quick Facts

CVE IDCVE-2015-5738
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-200
CISA KEVNo
Affected2 vendor(s)
PublishedJul 26, 2016

Related CVEs (CWE-200)

CVE-2026-40965
10.0
CVE-2011-0376
10.0
CVE-2008-3010
10.0
CVE-2026-27604
10.0
CVE-2008-0082
10.0
CVE-2008-3914
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2015-5738 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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