OpenSSH up to 5.x/6.x/7.1p1 roaming_common.c resend_bytes Memory information disclosure

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

Summaryinfo

A vulnerability was found in OpenSSH up to 5.x/6.x/7.1p1 and classified as problematic. Affected is the function resend_bytes of the file roaming_common.c. Executing a manipulation can lead to information disclosure (Memory). This vulnerability is handled as CVE-2016-0777. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in OpenSSH up to 5.x/6.x/7.1p1 (Connectivity Software) and classified as critical. This vulnerability affects the function resend_bytes of the file roaming_common.c. The manipulation with an unknown input leads to a information disclosure vulnerability (Memory). The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The resend_bytes function in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2 allows remote servers to obtain sensitive information from process memory by requesting transmission of an entire buffer, as demonstrated by reading a private key.

The weakness was released 01/14/2016 with Qualys as confirmed mailinglist post (oss-sec). The advisory is available at seclists.org. This vulnerability was named CVE-2016-0777 since 12/16/2015. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 87972 (Amazon Linux AMI : openssh (ALAS-2016-638)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 124644 (IBM AIX OpenSSH Multiple Vulnerabilities).

Upgrading to version 7.1p2 eliminates this vulnerability. A possible mitigation has been published 4 days after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 22609.

The vulnerability is also documented in the databases at X-Force (109635), Tenable (87972), SecurityFocus (BID 80695†) and Vulnerability Center (SBV-55705†). Entries connected to this vulnerability are available at VDB-80267, VDB-80330, VDB-81465 and VDB-81466. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.1

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

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Memory
Class: Information disclosure / Memory
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 87972
Nessus Name: Amazon Linux AMI : openssh (ALAS-2016-638)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703446
OpenVAS Name: Debian Security Advisory DSA 3446-1 (openssh - security update)
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
Suricata ID: 2022369
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Fortigate IPS: 🔍

Timelineinfo

12/16/2015 🔍
01/14/2016 +29 days 🔍
01/14/2016 +0 days 🔍
01/14/2016 +0 days 🔍
01/14/2016 +0 days 🔍
01/15/2016 +1 days 🔍
01/15/2016 +0 days 🔍
01/18/2016 +3 days 🔍
01/19/2016 +1 days 🔍
07/03/2022 +2357 days 🔍

Sourcesinfo

Advisory: USN-2869-1
Organization: Qualys
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-0777 (🔍)
GCVE (CVE): GCVE-0-2016-0777
GCVE (VulDB): GCVE-100-80266

OVAL: 🔍

X-Force: 109635 - OpenSSH private key information disclosure
SecurityFocus: 80695 - OpenSSH CVE-2016-0777 Information Disclosure Vulnerability
SecurityTracker: 1034671
Vulnerability Center: 55705 - OpenSSH Remote Information Disclosure via Transmission Request of an Entire Buffer, Medium

See also: 🔍

Entryinfo

Created: 01/15/2016 09:33
Updated: 07/03/2022 13:13
Changes: 01/15/2016 09:33 (77), 06/21/2018 09:03 (25), 07/03/2022 13:13 (4)
Complete: 🔍
Cache ID: 216:087:103

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

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