ProFTPD before 1.3.6b and 1.3.7rc before 1.3.7rc2 allows remote unauthenticated denial-of-service due to incorrect handling of overly long c
ProFTPD before 1.3.6b and 1.3.7rc before 1.3.7rc2 allows remote unauthenticated denial-of-service due to incorrect handling of overly long commands because main.c in a child process enters an infinite loop.
- Published
- Oct 21, 2019
- Updated
- Jun 16, 2026
- EPSS
- 20.3% · 97th percentile
- CWE
- CWE-835
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Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 6 / 30 · 20.3%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| proftpd | proftpd | cpe:2.3:a:proftpd:proftpd |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- proftpd proftpdup to 1.3.5 inclusive
- proftpd proftpd1.3.6
- proftpd proftpd1.3.7
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | proftpd-dfsg | before 1.3.6-4+deb10u2 | 1.3.6-4+deb10u2 |
| Debian:12 | proftpd-dfsg | before 1.3.6a-2 | 1.3.6a-2 |
| Debian:8 | proftpd-dfsg | before 1.3.5e+r1.3.5-2+deb8u4 | 1.3.5e+r1.3.5-2+deb8u4 |
| Debian:9 | proftpd-dfsg | before 1.3.5b-4+deb9u2 | 1.3.5b-4+deb9u2 |
| openSUSE:Tumbleweed | proftpd | before 1.3.6e-1.10 | 1.3.6e-1.10 |
| SUSE:Package Hub 15 | proftpd | before 1.3.6b-bp151.4.6.2 | 1.3.6b-bp151.4.6.2 |
| SUSE:Package Hub 15 | proftpd | before 1.3.6b-bp151.4.6.2 | 1.3.6b-bp151.4.6.2 |
Same product
proftpd: all recordsOther highest-scoring records for the same primary product.
- CVE-2015-3306The mod_copy module in ProFTPD 1.3.5 allows remote attackers to read and write to arbitrary files via the site cpfr and site cpto commands.69This week
- CVE-2010-4221Multiple stack-based buffer overflows in the pr_netio_telnet_gets function in netio.c in ProFTPD before 1.3.3c allow remote attackers to exe67This week
- CVE-2019-12815An arbitrary file copy vulnerability in mod_copy in ProFTPD up to 1.3.5b allows for remote code execution and information disclosure without56Plan
- CVE-2011-4130Use-after-free vulnerability in the Response API in ProFTPD before 1.3.3g allows remote authenticated users to execute arbitrary code via ve40Plan
- CVE-2010-20103ProFTPD 1.3.3c Backdoor Command Execution39Monitor
- CVE-2020-9273In ProFTPD 1.3.7, it is possible to corrupt the memory pool by interrupting the data transfer channel.39Monitor
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:proftpd-dfsg | 1.3.6a-2 · Debian:12 | Package registry (OSV) |
| opensuse:proftpd | 1.3.6b-bp151.4.6.2 · openSUSE:Leap 15.1 | Package registry (OSV) |
| suse:proftpd | 1.3.6b-bp151.4.6.2 · SUSE:Package Hub 15 | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Nuclei detection template ×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 |
|---|---|---|
| Nuclei detection template | Nuclei template CVE-2019-18217 | — |
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.
No dated events beyond publication.
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.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
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
- lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
- cert-portal.siemens.com/productcert/pdf/ssa-940889.pdf
- github.com/proftpd/proftpd/blob/1.3.6/NEWS
- github.com/proftpd/proftpd/blob/1.3.6/RELEASE_NOTES
- github.com/proftpd/proftpd/blob/master/NEWS
- github.com/proftpd/proftpd/blob/master/RELEASE_NOTES
- lists.debian.org/debian-lts-announce/2019/10/msg00036.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NJDQRVZTILBX4BUCTIRKP2WBHDHDCJR5/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RB2FPAWDWXT5ALAFIC5Y3RSEMXSFL6H2/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLRPYEEMQJVAXO2SXRGOQ4HBFEEPCNXG/
- seclists.org/bugtraq/2019/Nov/7
- security.gentoo.org/glsa/202003-35
- www.debian.org/security/2019/dsa-4559
Vendor advisories and official records. Exploit/PoC links are deliberately left out.