CVE-2019-18217: proftpd Loop with Unreachable Exit Condition
Vulnerability summary
CVE-2019-18217 is a high (CVSS 7.5) Loop with Unreachable Exit Condition vulnerability in proftpd. EPSS estimates a 20.25% chance of exploitation in the next 30 days, higher than 97.4% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (GitHub, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 21-10-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
20.25%
Chance of exploitation in the next 30 days
Percentile
97%
Versus all other CVEs
30-day change
No change 0.00 pp
From 20.25% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundProftpd
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- proftpd-dfsg< 1.3.6a-2 | < 1.3.5b-4+deb9u2 | < 1.3.6-4+deb10u2 | < 1.3.5e+r1.3.5-2+deb8u4
Proftpd1 product
- proftpdEOL≤ 1.3.5 | 1.3.6 | 1.3.6:a | 1.3.6:rc1 | 1.3.6:rc2 | 1.3.6:rc3 | 1.3.6:rc4 | 1.3.7:rc1
Ubuntu1 product
- proftpd-dfsgAll versions (No fix recorded)
3 vendors · 3 products
References
18 links- github.com/proftpd/proftpd/issues/846X Refsource MISCREPORTExploitIssue TrackingThird Party Advisory
- github.com/proftpd/proftpd/blob/master/RELEASE_NOTESX Refsource MISCREPORTRelease NotesThird Party Advisory
- github.com/proftpd/proftpd/blob/1.3.6/RELEASE_NOTESX Refsource MISCREPORTRelease NotesThird Party Advisory
Show all 18 references
- cert-portal.siemens.com/productcert/pdf/ssa-940889.pdfX Refsource CONFIRM