5.9
MEDIUM
CVE-2017-3737
OpenSSL Handshake Error State FLaw
Description

OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SSL_read()/SSL_write() being issued after having already received a fatal error. OpenSSL version 1.0.2b-1.0.2m are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is not affected.

INFO

Published Date :

Dec. 7, 2017, 4:29 p.m.

Last Modified :

Oct. 3, 2019, 12:03 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

2.2
Public PoC/Exploit Available at Github

CVE-2017-3737 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2017-3737 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Debian debian_linux
1 Openssl openssl
: Total Affected Vendor : 2 | Products : 2
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2017-3737.

URL Resource
http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
http://www.securityfocus.com/bid/102103 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1039978 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:0998
https://access.redhat.com/errata/RHSA-2018:2185
https://access.redhat.com/errata/RHSA-2018:2186
https://access.redhat.com/errata/RHSA-2018:2187
https://cert-portal.siemens.com/productcert/pdf/ssa-179516.pdf
https://github.com/openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc Third Party Advisory
https://security.gentoo.org/glsa/201712-03 Third Party Advisory
https://security.netapp.com/advisory/ntap-20171208-0001/ Third Party Advisory
https://security.netapp.com/advisory/ntap-20180117-0002/
https://security.netapp.com/advisory/ntap-20180419-0002/
https://www.debian.org/security/2017/dsa-4065 Third Party Advisory
https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/ Third Party Advisory
https://www.openssl.org/news/secadv/20171207.txt Vendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
https://www.tenable.com/security/tns-2017-16

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
chnzzh/OpenSSL-CVE-lib

None

Updated: 2 months, 2 weeks ago
5 stars 0 fork 0 watcher
Born at : Feb. 23, 2023, 5:42 a.m. This repo has been linked 455 different CVEs too.
Profile Photo
javirodriguezzz/Shodan-Browser

Python script to search queries on Shodan. It gives a detailed inform of each result in the search, including vulnerabilities and exploits.

Python

Updated: 2 years, 9 months ago
0 stars 0 fork 0 watcher
Born at : Feb. 16, 2022, 4:15 p.m. This repo has been linked 5 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2017-3737 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2017-3737 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CWE Remap by [email protected]

    Oct. 03, 2019

    Action Type Old Value New Value
    Changed CWE CWE-388 CWE-125 CWE-787
  • CVE Modified by [email protected]

    Jul. 23, 2019

    Action Type Old Value New Value
    Added Reference https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 09, 2018

    Action Type Old Value New Value
    Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-179516.pdf [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 19, 2018

    Action Type Old Value New Value
    Added Reference http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 14, 2018

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2018:2187 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2018:2186 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2018:2185 [No Types Assigned]
  • CVE Modified by [email protected]

    Apr. 21, 2018

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20180419-0002/ [No Types Assigned]
  • CVE Modified by [email protected]

    Apr. 20, 2018

    Action Type Old Value New Value
    Added Reference http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html [No Types Assigned]
  • CVE Modified by [email protected]

    Apr. 12, 2018

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2018:0998 [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 24, 2018

    Action Type Old Value New Value
    Added Reference https://github.com/openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 18, 2018

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20180117-0002/ [No Types Assigned]
    Added Reference http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 18, 2018

    Action Type Old Value New Value
    Added Reference https://www.tenable.com/security/tns-2017-16 [No Types Assigned]
  • Initial Analysis by [email protected]

    Dec. 22, 2017

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:M/Au:N/C:P/I:N/A:N)
    Added CVSS V3 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
    Changed Reference Type https://security.gentoo.org/glsa/201712-03 No Types Assigned https://security.gentoo.org/glsa/201712-03 Third Party Advisory
    Changed Reference Type http://www.securityfocus.com/bid/102103 No Types Assigned http://www.securityfocus.com/bid/102103 Third Party Advisory, VDB Entry
    Changed Reference Type https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/ No Types Assigned https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/ Third Party Advisory
    Changed Reference Type https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc No Types Assigned https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc Third Party Advisory
    Changed Reference Type http://www.securitytracker.com/id/1039978 No Types Assigned http://www.securitytracker.com/id/1039978 Third Party Advisory, VDB Entry
    Changed Reference Type https://security.netapp.com/advisory/ntap-20171208-0001/ No Types Assigned https://security.netapp.com/advisory/ntap-20171208-0001/ Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2017/dsa-4065 No Types Assigned https://www.debian.org/security/2017/dsa-4065 Third Party Advisory
    Changed Reference Type https://www.openssl.org/news/secadv/20171207.txt No Types Assigned https://www.openssl.org/news/secadv/20171207.txt Vendor Advisory
    Added CWE CWE-388
    Added CPE Configuration OR *cpe:2.3:a:openssl:openssl:1.0.2b:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:1.0.2c:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:1.0.2d:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:1.0.2e:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:1.0.2f:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:1.0.2g:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:1.0.2h:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:1.0.2i:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:1.0.2j:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:1.0.2k:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:1.0.2l:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:1.0.2m:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Dec. 19, 2017

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2017/dsa-4065 [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 16, 2017

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/201712-03 [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 14, 2017

    Action Type Old Value New Value
    Added Reference https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/ [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 11, 2017

    Action Type Old Value New Value
    Added Reference https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 10, 2017

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20171208-0001/ [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 09, 2017

    Action Type Old Value New Value
    Added Reference http://www.securitytracker.com/id/1039978 [No Types Assigned]
    Added Reference http://www.securityfocus.com/bid/102103 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2017-3737 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2017-3737 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

94.55 }} -1.00%

score

0.99172

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: