SSH Secure Shell 1.2.23/1.2.25 CBC/CFB Modes Insertion missing encryption
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.1 | $0-$5k | 0.02 |
A vulnerability was found in SSH Secure Shell 1.2.23/1.2.25 (SSH Server Software) and classified as critical. This issue affects some unknown processing of the component CBC/CFB Modes. The manipulation with an unknown input leads to a missing encryption vulnerability (Insertion). Using CWE to declare the problem leads to CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. Impacted is integrity. The summary by CVE is:
SSH 1.2.25, 1.2.23, and other versions, when used in in CBC (Cipher Block Chaining) or CFB (Cipher Feedback 64 bits) modes, allows remote attackers to insert arbitrary data into an existing stream between an SSH client and server by using a known plaintext attack and computing a valid CRC-32 checksum for the packet, aka the "SSH insertion attack."
The weakness was presented 06/12/1998 as not defined posting (Bugtraq). The advisory is shared at marc.theaimsgroup.com. The identification of this vulnerability is CVE-1999-1085. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/04/2019). MITRE ATT&CK project uses the attack technique T1600 for this issue. Due to its background and reception, this vulnerability has a historic impact.
The vulnerability scanner Nessus provides a plugin with the ID 10268 (SSH CBC/CFB Data Stream Injection), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r.
Upgrading eliminates this vulnerability.
The vulnerability is also documented in the databases at X-Force (1126) and Tenable (10268). kb.cert.org is providing further details.
Product
Type
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: 5.3VulDB Meta Temp Score: 5.1
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
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: InsertionClass: Missing encryption / Insertion
CWE: CWE-311 / CWE-310
ATT&CK: T1600
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Nessus ID: 10268
Nessus Name: SSH CBC/CFB Data Stream Injection
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Timeline
06/12/1998 🔍06/12/1998 🔍
06/12/1998 🔍
07/23/1999 🔍
10/09/2002 🔍
06/19/2014 🔍
05/04/2019 🔍
Sources
Advisory: marc.theaimsgroup.comStatus: Not defined
CVE: CVE-1999-1085 (🔍)
X-Force: 1126 - SSH can accept inserted data in encrypted sessions
Vulnerability Center: 63 - SSH in CBC/CFB Mode Allows Arbitrary Data Insert via Known Plaintext Attack, Low
Misc.: 🔍
Entry
Created: 06/19/2014 15:52Updated: 05/04/2019 20:23
Changes: 06/19/2014 15:52 (43), 05/04/2019 20:23 (24)
Complete: 🔍
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