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7 vulnerabilities by vsftpd
CVE-2026-119568 (GCVE-0-2026-119568)
Vulnerability from nvd – Published: 2026-10-30 11:31 – Updated: 2026-10-30 15:54
VLAI
EPSS
VEX
Title
vsftpd through 3.0.5 require_ssl_reuse Bypass via FTPS Data Channel Hijacking
Summary
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.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 15:34 UTC
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://abraxaslabs.tech/research/vsftpd-ssl-data… | third-party-advisory |
| https://security.appspot.com/vsftpd.html | product |
| https://www.vulncheck.com/advisories/vsftpd-throu… | third-party-advisory |
Impacted products
Date Public
2026-10-12 00:00
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CVE-2026-119567 (GCVE-0-2026-119567)
Vulnerability from nvd – Published: 2026-10-30 11:31 – Updated: 2026-11-05 21:23
VLAI
EPSS
VEX
Title
vsftpd through 3.0.5 cmds_denied Bypass via RFC 775 Command Aliases
Summary
vsftpd through 3.0.5 contains an access control bypass vulnerability that allows authenticated FTP users to execute denied commands by issuing RFC 775 X-prefixed aliases. The cmds_denied check in process_post_login() compares literal tokens, so attackers can send XRMD, XMKD, XCWD, XPWD, or XCUP to perform blocked operations like deleting directories.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 21:22 UTC
CWE
- CWE-184 - Incomplete List of Disallowed Inputs
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://abraxaslabs.tech/research/vsftpd-cmds-den… | third-party-advisory |
| https://security.appspot.com/vsftpd.html | product |
| https://www.vulncheck.com/advisories/vsftpd-throu… | third-party-advisory |
Impacted products
Date Public
2026-10-12 00:00
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CVE-2011-2523 (GCVE-0-2011-2523)
Vulnerability from nvd – Published: 2019-11-27 20:36 – Updated: 2024-08-06 23:00
VLAI
EPSS
VEX
Summary
vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.
Severity
No CVSS data available.
CWE
- UNKNOWN_TYPE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://security-tracker.debian.org/tracker/CVE-2… | x_refsource_MISC |
| https://access.redhat.com/security/cve/cve-2011-2523 | x_refsource_MISC |
| https://www.openwall.com/lists/oss-security/2011/… | mailing-listx_refsource_MLIST |
| https://vigilance.fr/vulnerability/vsftpd-backdoo… | x_refsource_MISC |
| https://packetstormsecurity.com/files/102745/VSFT… | x_refsource_MISC |
| http://packetstormsecurity.com/files/162145/vsftp… | x_refsource_MISC |
Impacted products
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CVE-2026-119568 (GCVE-0-2026-119568)
Vulnerability from cvelistv5 – Published: 2026-10-30 11:31 – Updated: 2026-10-30 15:54
VLAI
EPSS
VEX
Title
vsftpd through 3.0.5 require_ssl_reuse Bypass via FTPS Data Channel Hijacking
Summary
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.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 15:34 UTC
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://abraxaslabs.tech/research/vsftpd-ssl-data… | third-party-advisory |
| https://security.appspot.com/vsftpd.html | product |
| https://www.vulncheck.com/advisories/vsftpd-throu… | third-party-advisory |
Impacted products
Date Public
2026-10-12 00:00
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CVE-2026-119567 (GCVE-0-2026-119567)
Vulnerability from cvelistv5 – Published: 2026-10-30 11:31 – Updated: 2026-11-05 21:23
VLAI
EPSS
VEX
Title
vsftpd through 3.0.5 cmds_denied Bypass via RFC 775 Command Aliases
Summary
vsftpd through 3.0.5 contains an access control bypass vulnerability that allows authenticated FTP users to execute denied commands by issuing RFC 775 X-prefixed aliases. The cmds_denied check in process_post_login() compares literal tokens, so attackers can send XRMD, XMKD, XCWD, XPWD, or XCUP to perform blocked operations like deleting directories.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 21:22 UTC
CWE
- CWE-184 - Incomplete List of Disallowed Inputs
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://abraxaslabs.tech/research/vsftpd-cmds-den… | third-party-advisory |
| https://security.appspot.com/vsftpd.html | product |
| https://www.vulncheck.com/advisories/vsftpd-throu… | third-party-advisory |
Impacted products
Date Public
2026-10-12 00:00
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CVE-2011-2523 (GCVE-0-2011-2523)
Vulnerability from cvelistv5 – Published: 2019-11-27 20:36 – Updated: 2024-08-06 23:00
VLAI
EPSS
VEX
Summary
vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.
Severity
No CVSS data available.
CWE
- UNKNOWN_TYPE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://security-tracker.debian.org/tracker/CVE-2… | x_refsource_MISC |
| https://access.redhat.com/security/cve/cve-2011-2523 | x_refsource_MISC |
| https://www.openwall.com/lists/oss-security/2011/… | mailing-listx_refsource_MLIST |
| https://vigilance.fr/vulnerability/vsftpd-backdoo… | x_refsource_MISC |
| https://packetstormsecurity.com/files/102745/VSFT… | x_refsource_MISC |
| http://packetstormsecurity.com/files/162145/vsftp… | x_refsource_MISC |
Impacted products
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VAR-202107-1672
Vulnerability from variot - Updated: 2024-11-23 20:00ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificates. A MiTM attacker having access to victim's traffic at the TCP/IP layer can redirect traffic from one subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS and cross-protocol attacks may be possible where the behavior of one protocol service may compromise the other at the application layer. F5 Networks of nginx Products from other vendors contain vulnerabilities related to certificate validation.Information may be obtained and information may be tampered with. (CVE-2020-11724). ========================================================================== Ubuntu Security Notice USN-5371-2 April 28, 2022
nginx vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
Summary:
nginx could be made to redirect network traffic.
Software Description: - nginx: small, powerful, scalable web/proxy server
Details:
USN-5371-1 fixed several vulnerabilities in nginx. This update provides the fix for CVE-2021-3618 for Ubuntu 22.04 LTS.
Original advisory details:
It was discovered that nginx Lua module mishandled certain inputs. An attacker could possibly use this issue to perform an HTTP Request Smuggling attack. This issue only affects Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-11724)
It was discovered that nginx Lua module mishandled certain inputs. An attacker could possibly use this issue to disclose sensitive information. This issue only affects Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-36309)
It was discovered that nginx mishandled the use of compatible certificates among multiple encryption protocols. (CVE-2021-3618)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 22.04 LTS: nginx-core 1.18.0-6ubuntu14.1 nginx-extras 1.18.0-6ubuntu14.1 nginx-light 1.18.0-6ubuntu14.1
In general, a standard system update will make all the necessary changes.
References: https://ubuntu.com/security/notices/USN-5371-2 https://ubuntu.com/security/notices/USN-5371-1 CVE-2021-3618
Package Information: https://launchpad.net/ubuntu/+source/nginx/1.18.0-6ubuntu14.1
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