OpenSSH up to 7.1p1 packet.c ssh_packet_read_poll2 memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.5$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in OpenSSH up to 7.1p1. This affects the function ssh_packet_read_poll2 of the file packet.c. Such manipulation leads to memory corruption. This vulnerability is referenced as CVE-2016-1907. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in OpenSSH up to 7.1p1 (Connectivity Software) and classified as critical. Affected by this issue is the function ssh_packet_read_poll2 of the file packet.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The ssh_packet_read_poll2 function in packet.c in OpenSSH before 7.1p2 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via crafted network traffic.

The weakness was published 01/19/2016 by Ben Hawkes (Website). The advisory is available at anongit.mindrot.org. This vulnerability is handled as CVE-2016-1907 since 01/15/2016. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/03/2022).

As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 88464 (Fedora 23 : gsi-openssh-7.1p2-1.fc23 (2016-4556904561)), 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 196464 (Ubuntu Security Notification for Openssh Vulnerabilities (USN-2966-1)).

Upgrading to version 7.1p2 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (88464), SecurityFocus (BID 81293†) and Vulnerability Center (SBV-55767†). Similar entries are available at VDB-80266, VDB-80267, VDB-81320 and VDB-81465. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.5

VulDB Base Score: 8.1
VulDB Temp Score: 7.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 88464
Nessus Name: Fedora 23 : gsi-openssh-7.1p2-1.fc23 (2016-4556904561)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for gsi-openssh FEDORA-2016-4556904561
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: OpenSSH 7.1p2
Patch: anongit.mindrot.org

Timelineinfo

01/15/2016 🔍
01/19/2016 +4 days 🔍
01/19/2016 +0 days 🔍
01/19/2016 +0 days 🔍
01/19/2016 +0 days 🔍
01/20/2016 +1 days 🔍
01/20/2016 +0 days 🔍
01/28/2016 +8 days 🔍
01/29/2016 +1 days 🔍
07/03/2022 +2347 days 🔍

Sourcesinfo

Advisory: FEDORA-2016-4556904561
Researcher: Ben Hawkes
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-1907 (🔍)
GCVE (CVE): GCVE-0-2016-1907
GCVE (VulDB): GCVE-100-80330
SecurityFocus: 81293 - OpenSSH CVE-2016-1907 Denial of Service Vulnerability
Vulnerability Center: 55767 - OpenSSH before 7.1p2 Remote DoS Vulnerability via Crafted Network Traffic, Medium

See also: 🔍

Entryinfo

Created: 01/20/2016 10:08
Updated: 07/03/2022 17:01
Changes: 01/20/2016 10:08 (65), 07/05/2018 09:02 (25), 07/03/2022 16:53 (4), 07/03/2022 17:01 (1)
Complete: 🔍
Cache ID: 216:C99:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!