Public proof of conceptFix available

CVE-2015-3197

A public proof of concept exists; no exploitation attested.

Published2016-02-15
WeaknessCWE-200 · CWE-310

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

ssl/s2_srvr.c in OpenSSL 1.0.1 before 1.0.1r and 1.0.2 before 1.0.2f does not prevent use of disabled ciphers, which makes it easier for man-in-the-middle attackers to defeat cryptographic protection mechanisms by performing computations on SSLv2 traffic, related to the get_client_master_key and get_client_hello functions.

Timeline

dates in UTC

2016-02-1502:59CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2015-3197?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2015-3197?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

OpenSSL

Branch	Affected	Fixed in	Source
1.0	= 1.0.1	no fix published	NVD
1.0	= 1.0.1a	no fix published	NVD
1.0	= 1.0.1b	no fix published	NVD
1.0	= 1.0.1c	no fix published	NVD
1.0	= 1.0.1d	no fix published	NVD
1.0	= 1.0.1e	no fix published	NVD
1.0	= 1.0.1f	no fix published	NVD
1.0	= 1.0.1g	no fix published	NVD
1.0	= 1.0.1h	no fix published	NVD
1.0	= 1.0.1i	no fix published	NVD
1.0	= 1.0.1j	no fix published	NVD
1.0	= 1.0.1k	no fix published	NVD

Oracle peoplesoft enterprise peopletools

Branch	Affected	Fixed in	Source
8.53	= 8.53	no fix published	NVD
8.54	= 8.54	no fix published	NVD
8.55	= 8.55	no fix published	NVD

Oracle exalogic infrastructure

Branch	Affected	Fixed in	Source
1.0	= 1.0	no fix published	NVD
2.0	= 2.0	no fix published	NVD

3 more products in the sources.

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

Fix

Advisories and patches

www.openssl.orgVendor Advisory
www.oracle.comPatch

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedTrinadh465/OpenSSL-1_0_1g_CVE-2015-3197

Sources

NVDCVSS 3.05.9read 2026-10-23
NVDCVSS 2.04.3read 2026-10-23
NVDweakness (CWE)CWE-200, CWE-310read 2026-10-23
FIRST EPSSEPSS score10.7 %read 2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23

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: 2016-02-15
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2015-3197?

Is CVE-2015-3197 actively exploited?

Active exploitation of CVE-2015-3197 has not been confirmed. Its EPSS score was 10.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2015-3197?

CVE-2015-3197 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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