Valve Steam Link Build 643 SSH Daemon MAC Address credentials management
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
8.0 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, has been found in Valve Steam Link Build 643. This issue affects some unknown functionality of the component SSH Daemon. The manipulation with an unknown input leads to a credentials management vulnerability (MAC Address). Using CWE to declare the problem leads to CWE-255. Impacted is confidentiality, integrity, and availability. The summary by CVE is:
An issue was discovered in Valve Steam Link build 643. When the SSH daemon is enabled for local development, the device is publicly available via IPv6 TCP port 22 over the internet (with stateless address autoconfiguration) by default, which makes it easier for remote attackers to obtain access by guessing 24 bits of the MAC address and attempting a root login. This can be exploited in conjunction with CVE-2017-17878.
The bug was discovered 12/23/2017. The weakness was released 12/27/2017 (Website). It is possible to read the advisory at blogger.davidmanouchehri.com. The identification of this vulnerability is CVE-2017-17877 since 12/23/2017. The attack may be initiated remotely. A simple authentication is required for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.
The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k.
Addressing this vulnerability is possible by firewalling tcp/22 (ssh).
Entry connected to this vulnerability is available at 111072.
Product
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 8.0VulDB Meta Temp Score: 8.0
VulDB Base Score: 6.3
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 9.8
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Name: MAC AddressClass: Credentials management / MAC Address
CWE: CWE-255
ATT&CK: T1552
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: FirewallStatus: 🔍
0-Day Time: 🔍
Firewalling: 🔍
Timeline
12/23/2017 🔍12/23/2017 🔍
12/27/2017 🔍
12/27/2017 🔍
12/28/2017 🔍
01/19/2023 🔍
Sources
Advisory: 119Status: Not defined
CVE: CVE-2017-17877 (🔍)
See also: 🔍
Entry
Created: 12/28/2017 09:44Updated: 01/19/2023 09:21
Changes: 12/28/2017 09:44 (61), 12/18/2019 10:05 (1), 01/19/2023 09:21 (4)
Complete: 🔍
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