CVE-2017-7494
Samba — Samba Remote Code Execution Vulnerability
Samba · CWE-94 — Code injection · in CISA KEV since 2023-03-30
EVRS 94 of 100 Immediate
Out-of-Band / Urgent Remediation
Rank 66 of 2,960 tracked
Why it scores 94
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and associated with known ransomware campaigns.
- CISA KEVApplied
- RansomwareApplied
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
Fixed in
samba -> 2:4.3.11+dfsg-0ubuntu0.14.04.8 | samba -> 2:4.3.11+dfsg-0ubuntu0.16.04.7 | samba -> 2:4.5.8+dfsg-2
Affected versions
- samba
>= 3.5.0 < 4.4.0>= 4.4.0 < 4.4.14>= 4.5.0 < 4.5.10>= 4.6.0 < 4.6.4 - debian linux
8.0
Remediation
Apply updates per vendor instructions.
Fixed versions from NVD.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 9.8 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.994 (99.94th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Known | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2023-04-20 · KEV since 2023 · listed over a year | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | Public module exists | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 9.8 (v3.1), assigned by redhat. | Listed | ENISA EUVD |
Description
NVDSamba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote code execution vulnerability, allowing a malicious client to upload a shared library to a writable share, and then cause the server to load and execute it.
What CISA says to do
Public module
Metasploit lists a public excellent-rank module for this CVE: Samba is_known_pipename() Arbitrary Module Load (linux/samba/is_known_pipename). A module existing is not the same as active exploitation; see metasploit.com.