OpenSSL up to 0.9.8/1.0.1/1.0.2h/1.1.0 Alert ssl/s3_pkt.c ssl3_read_bytes Death Alert resource management

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in OpenSSL up to 0.9.8/1.0.1/1.0.2h/1.1.0. This affects the function ssl3_read_bytes of the file ssl/s3_pkt.c of the component Alert Handler. This manipulation causes resource management (Death Alert). This vulnerability appears as CVE-2016-8610. The attack may be initiated remotely. In addition, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in OpenSSL up to 0.9.8/1.0.1/1.0.2h/1.1.0 (Network Encryption Software) and classified as critical. Affected by this vulnerability is the function ssl3_read_bytes of the file ssl/s3_pkt.c of the component Alert Handler. The manipulation with an unknown input leads to a resource management vulnerability (Death Alert). The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability.

The weakness was presented 10/24/2016 by Shi Lei with Qihoo 360 as CVE-2016-8610: SSL Death Alert: OpenSSL SSL/TLS SSL3_AL_WARNING undefined alert Remote DoS as confirmed mailinglist post (oss-sec). The advisory is shared at seclists.org. The public release was coordinated in cooperation with the project team. The mailinglist post contains:

We reported this issue to OpenSSL team in early September, and they told us they won't treat it as a security issue, but they allowed us to discuss it with whomever we wish.
This vulnerability is known as CVE-2016-8610 since 10/12/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

A public exploit has been developed by Shi Lei in Python and been published immediately after the advisory. It is possible to download the exploit at seclists.org. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 97054 (Fedora 25 : 1:openssl (2017-3451dbec48)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175949 (Debian Security Update for openssl (DSA 3773-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability. The mailinglist post contains the following remark:

BTW, the issue has been fixed in the official release on September 22nd.

The vulnerability is also documented in the databases at Tenable (97054), SecurityFocus (BID 93841†) and SecurityTracker (ID 1037084†). Additional details are provided at reddit.com. See VDB-95275, VDB-96036, VDB-98657 and VDB-98665 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Death Alert
Class: Resource management / Death Alert
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Shi Lei
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 97054
Nessus Name: Fedora 25 : 1:openssl (2017-3451dbec48)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for openssl CESA-2017:0286 centos7
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Patch: af58be768ebb690f78530f796e92b8ae5c9a4401

Timelineinfo

09/22/2016 🔍
10/12/2016 +20 days 🔍
10/24/2016 +12 days 🔍
10/24/2016 +0 days 🔍
10/24/2016 +0 days 🔍
10/24/2016 +0 days 🔍
10/25/2016 +1 days 🔍
02/08/2017 +106 days 🔍
11/13/2017 +278 days 🔍
09/28/2022 +1780 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: CVE-2016-8610: SSL Death Alert: OpenSSL SSL/TLS SSL3_AL_WARNING undefined alert Remote DoS
Researcher: Shi Lei
Organization: Qihoo 360
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-8610 (🔍)
GCVE (CVE): GCVE-0-2016-8610
GCVE (VulDB): GCVE-100-93073

OVAL: 🔍

SecurityFocus: 93841 - OpenSSL CVE-2016-8610 Denial of Service Vulnerability
SecurityTracker: 1037084

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/25/2016 09:12
Updated: 09/28/2022 12:35
Changes: 10/25/2016 09:12 (86), 05/17/2019 20:18 (13), 09/28/2022 12:35 (5)
Complete: 🔍
Cache ID: 216:4D8:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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