Error handling in the SSH protocol in (1) SSH Tectia Client and Server and Connector 4.0 through 4.4.11, 5.0 through 5.2.4, and 5.3 through
Error handling in the SSH protocol in (1) SSH Tectia Client and Server and Connector 4.0 through 4.4.11, 5.0 through 5.2.4, and 5.3 through 5.3.8; Client and Server and ConnectSecure 6.0 through 6.0.4; Server for Linux on IBM System z 6.0.4; Server for IBM z/OS 5.5.1 and earlier, 6.0.0, and 6.0.1; and Client 4.0-J through 4.3.3-J and 4.0-K through 4.3.10-K; and (2) OpenSSH 4.7p1 and possibly other versions, when using a block cipher algorithm in Cipher Block Chaining (CBC) mode, makes it easier for remote attackers to recover certain plaintext data from an arbitrary block of ciphertext in an SSH session via unknown vectors.
- Published
- Nov 19, 2008
- Updated
- Jun 16, 2026
- EPSS
- 18.6% · 97th percentile
- CWE
- CWE-200
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
20
Monitor
Low priority for now.
- CVSS
- 14 / 40 · 3.7 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 6 / 30 · 18.6%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| ssh | tectia client | cpe:2.3:a:ssh:tectia_client |
| ssh | tectia connector | cpe:2.3:a:ssh:tectia_connector |
| ssh | tectia connectsecure | cpe:2.3:a:ssh:tectia_connectsecure |
| ssh | tectia server | cpe:2.3:a:ssh:tectia_server |
| openbsd | openssh | cpe:2.3:a:openbsd:openssh |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- openbsd openssh4.7p1
- ssh tectia client4.0
- ssh tectia client4.0.1
- ssh tectia client4.0.3
- ssh tectia client4.0.4
- ssh tectia client4.0.5
- ssh tectia client4.2
- ssh tectia client4.2.1
- ssh tectia client4.3
- ssh tectia client4.3.1
- ssh tectia client4.3.1j
- ssh tectia client4.3.2
- ssh tectia client4.3.2j
- ssh tectia client4.3.3
- ssh tectia client4.3.4
- ssh tectia client4.3.5
- ssh tectia client4.3.6
- ssh tectia client4.3.7
- ssh tectia client4.3.8k
- ssh tectia client4.3.9k
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | openssh | before 1:5.1p1-5 | 1:5.1p1-5 |
| Red Hat:enterprise_linux:5::client | openssh | before 0:4.3p2-36.el5 | 0:4.3p2-36.el5 |
| Red Hat:enterprise_linux:5::client | openssh-askpass | before 0:4.3p2-36.el5 | 0:4.3p2-36.el5 |
| Red Hat:enterprise_linux:5::client | openssh-clients | before 0:4.3p2-36.el5 | 0:4.3p2-36.el5 |
| Red Hat:enterprise_linux:5::client | openssh-debuginfo | before 0:4.3p2-36.el5 | 0:4.3p2-36.el5 |
| Red Hat:enterprise_linux:5::client | openssh-server | before 0:4.3p2-36.el5 | 0:4.3p2-36.el5 |
Same product
ssh: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-27891SSH Tectia Client and Server before 6.4.19 on Windows have weak key generation.35Monitor
- CVE-2021-27892SSH Tectia Client and Server before 6.4.19 on Windows allow local privilege escalation.31Monitor
- CVE-2021-27893SSH Tectia Client and Server before 6.4.19 on Windows allow local privilege escalation in nonstandard conditions.28Monitor
- CVE-2007-5616ssh-signer in SSH Tectia Client and Server 5.x before 5.2.4, and 5.3.x before 5.3.6, on Unix and Linux allows local users to gain privileges28Monitor
- CVE-2006-4315Unquoted Windows search path vulnerability in multiple SSH Tectia products, including Client/Server/Connector 5.0.0 and 5.0.1 and Client/Ser28Monitor
- CVE-2006-5484SSH Tectia Client/Server/Connector 5.1.0 and earlier, Manager 2.2.0 and earlier, and other products, when using an RSA key with exponent 3, 20Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:openssh | 1:5.1p1-5 · Debian:12 | Package registry (OSV) |
| red hat:openssh | 0:4.3p2-36.el5 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
| red hat:openssh-askpass | 0:4.3p2-36.el5 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
| red hat:openssh-clients | 0:4.3p2-36.el5 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
| red hat:openssh-debuginfo | 0:4.3p2-36.el5 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
| red hat:openssh-server | 0:4.3p2-36.el5 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Metasploit module | auxiliary/scanner/ssh/ssh_versionSSH Version Scannerauxiliary | — |
| Proof-of-concept repository on GitHub | stars:0 | 2025-10-08 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+6166 d
- TodaySep 30, 2026+6524 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- low · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- Low
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-200 · Exposure of Sensitive Information to an Unauthorized ActorCVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
nvd-secondary
Root cause
The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.
The bug in code
The whole CWE-200 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
{ "permissions": ["tabs", "<all_urls>"], "background": { "service_worker": "analytics.js" }}Fixed
{ "permissions": ["activeTab"], "host_permissions": ["https://yildiz.example/*"]}Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- ExcavationCAPEC-116likelihood: High · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
- FootprintingCAPEC-169likelihood: High · Very Low
- Exploiting Trust in ClientCAPEC-22likelihood: High · High
- FingerprintingCAPEC-224likelihood: High · Very Low
- ICMP Echo Request PingCAPEC-285likelihood: Medium · Low
- TCP SYN ScanCAPEC-287Low
- Enumerate Mail Exchange (MX) RecordsCAPEC-290Low
ATT&CK techniques
- System Service DiscoveryT1007
- System Network Configuration DiscoveryT1016
- Remote System DiscoveryT1018
- System Owner/User DiscoveryT1033
- Masquerading: Match Legitimate Name or LocationT1036.005
- Network Service ScanningT1046
- System Network Connections DiscoveryT1049
- Process DiscoveryT1057
- Permission Groups DiscoveryT1069
- System Information DiscoveryT1082
- File and Directory DiscoveryT1083
- Account DiscoveryT1087
- Multi-Factor Authentication InterceptionT1111
- Peripheral Device DiscoveryT1120
- System Time DiscoveryT1124
- Access Token Manipulation:Token Impersonation/TheftT1134.001
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- isc.sans.org/diary.html?storyid=5366
- kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
- lists.apple.com/archives/security-announce/2009/Nov/msg00000.html
- marc.info/?l=bugtraq&m=125017764422557&w=2
- openssh.org/txt/cbc.adv
- osvdb.org/49872
- osvdb.org/50035
- osvdb.org/50036
- rhn.redhat.com/errata/RHSA-2009-1287.html
- secunia.com/advisories/32740
- secunia.com/advisories/32760
- secunia.com/advisories/32833
- secunia.com/advisories/33121
- secunia.com/advisories/33308
- secunia.com/advisories/34857
- secunia.com/advisories/36558
- sunsolve.sun.com/search/document.do?assetkey=1-66-247186-1
- support.apple.com/kb/HT3937
- support.attachmate.com/techdocs/2398.html
- support.avaya.com/elmodocs2/security/ASA-2008-503.htm
Vendor advisories and official records. Exploit/PoC links are deliberately left out.