CVE-2017-15271
CVSS V2 Medium 4.3
CVSS V3 Medium 5.9
Description
A use-after-free issue could be triggered remotely in the SFTP component of PSFTPd 10.0.4 Build 729. This issue could be triggered prior to authentication. The PSFTPd server did not automatically restart, which enabled attackers to perform a very effective DoS attack against this service. By sending a crafted SSH identification / version string to the server, a NULL pointer dereference could be caused, apparently because of a race condition in the window message handling, performing the cleanup for invalid connections. This incorrect cleanup code has a use-after-free.
Overview
- CVE ID
- CVE-2017-15271
- Assigner
- cve@mitre.org
- Vulnerability Status
- Modified
- Published Version
- 2017-11-15T16:29:00
- Last Modified Date
- 2018-10-09T20:01:08
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:psftp:psftpd:10.0.4:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.0
- Vector String
- CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 5.9
- Base Severity
- MEDIUM
- Exploitability Score
- 2.2
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://www.x41-dsec.de/lab/advisories/x41-2017-006-psftpd/ | Third Party Advisory |
| http://packetstormsecurity.com/files/144972/PSFTPd-Windows-FTP-Server-10.0.4-Build-729-Use-After-Free-Log-Injection.html | Third Party Advisory VDB Entry |
| https://www.exploit-db.com/exploits/43144/ | Third Party Advisory VDB Entry |
| http://www.securityfocus.com/archive/1/541518/100/0/threaded |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2017-15271 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15271 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 18:33:32 | Added to TrackCVE | |||
| 2022-12-02 23:04:25 | 2017-11-15T16:29Z | 2017-11-15T16:29:00 | CVE Published Date | updated |
| 2022-12-02 23:04:25 | 2018-10-09T20:01:08 | CVE Modified Date | updated | |
| 2022-12-02 23:04:25 | Modified | Vulnerability Status | updated |