vsftpd 3.0.5 版發現 FTPS 資料通道劫持漏洞
CVE-2026-119568 - vsftpd through 3.0.5 require_ssl_reuse Bypass via FTPS Data Channel Hijacking
vsftpd 3.0.5 版發現一個身份驗證繞過漏洞，可讓未授權攻擊者 hijack FTPS 資料通道。
- 漏洞原理：在
ssl_data_accept()中允許攻擊者使用自己的 TLS session ticket 恢復連線，並以相同來源 IP 連線 PASV 埠，竊取下載或注入上傳資料。
此漏洞允許未授權攻擊者 hijack FTPS 資料通道，影響多個版本的 vsftpd，提示使用者即刻升級以保護資料傳輸安全。
vsftpd through 3.0.5 contains an authentication bypass vulnerability in ssl_data_accept() that allows unauthenticated attackers to hijack FTPS data connections by resuming their own TLS session ticket. Attackers sharing the victim's source IP can obtain a ticket via AUTH TLS, then connect to the victim's PASV port to steal downloads or inject upload data.
Impact
Affected Products
The following products are affected by CVE-2026-119568
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
| ID | Vendor | Product | Action |
|---|---|---|---|
| 1 | Vsftpd_project | vsftpd |
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Update vsftpd to a version that addresses the authentication bypass flaw.
- Update vsftpd to version 3.0.6 or later.
- Review TLS session ticket handling configurations.
- Monitor network traffic for suspicious connections.
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-119568.
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-119568 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification
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stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-119568
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-119568 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-119568 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
十月. 30, 2026
Action Type Old Value New Value Added Description vsftpd through 3.0.5 contains an authentication bypass vulnerability in ssl_data_accept() that allows unauthenticated attackers to hijack FTPS data connections by resuming their own TLS session ticket. Attackers sharing the victim's source IP can obtain a ticket via AUTH TLS, then connect to the victim's PASV port to steal downloads or inject upload data. Added CVSS V4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-940 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/119xxx/CVE-2026-119568.json">CVE-2026-119568</a> Added Reference https://abraxaslabs.tech/research/vsftpd-ssl-data-any-ticket Added Reference https://security.appspot.com/vsftpd.html Added Reference https://www.vulncheck.com/advisories/vsftpd-through-3.0.5-require-ssl-reuse-bypass-via-ftps-data-channel-hijacking
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.