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Public proof of conceptFix available

CVE-2020-8285

A public proof of concept exists; no exploitation attested.

  • Published2020-12-14
  • Fixed in10.15.7 · 10.14.6
  • WeaknessCWE-674 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

curl 7.21.0 to and including 7.73.0 is vulnerable to uncontrolled recursion due to a stack overflow issue in FTP wildcard match parsing.

Timeline

dates in UTC
  1. 2020-12-1420:15CVE publishedNVD

Versions per branch

NVD
Apple mac os x
BranchAffectedFixed in
10.15≥ 10.15, < 10.15.710.15.7
10.14< 10.14.610.14.6
10.14= 10.14.6no fix published
10.15= 10.15.7no fix published
Splunk universal forwarder
BranchAffectedFixed in
9.0≥ 9.0.0, < 9.0.69.0.6
8.2≥ 8.2.0, < 8.2.128.2.12
9.1= 9.1.0no fix published
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
10.0= 10.0no fix published

19 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As hackerone, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • https://github.com/curl/curl
    Affected
    • = libcurl 7.21.0 to and including 7.73.0no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2022-04-19

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • curlUbuntu:Pro:14.04:LTSall versions · fixed in 7.35.0-1ubuntu2.20+esm6
  • curlUbuntu:20.04:LTSall versions · fixed in 7.68.0-1ubuntu2.4
  • curlUbuntu:18.04:LTSall versions · fixed in 7.58.0-2ubuntu3.12
  • curlUbuntu:16.04:LTSall versions · fixed in 7.47.0-1ubuntu2.18
  • curlSUSE:OpenStack Cloud Crowbar 9all versions · fixed in 7.60.0-4.20.1
  • curlSUSE:OpenStack Cloud 9all versions · fixed in 7.60.0-4.20.1
  • curlSUSE:Linux Enterprise Software Development Kit 12 SP5all versions · fixed in 7.60.0-11.9.1
  • curlSUSE:Linux Enterprise Server for SAP Applications 12 SP5all versions · fixed in 7.60.0-11.9.1

65 more package ranges on OSV.dev

Vendor advisories

  • CVE-2020-8285 Red Hat Product Security189 products fixed · 15 known affected

    curl: Malicious FTP server can trigger stack overflow when CURLOPT_CHUNK_BGN_FUNCTION is used

    curl.src as a component of Red Hat Ceph Storage 2 · libcurl as a component of Red Hat Ceph Storage 2 · curl.src as a component of Red Hat Enterprise Linux 5 · +12 more

  • ICSA-23-348-10 CISA5 known affected

    Siemens SIMATIC S7-1500

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) · +2 more

  • SSA-398330 Siemens ProductCERT5 known affected

    SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= V3.1.0 < V3.1.5 · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= V3.1.0 < V3.1.5 · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= V3.1.0 < V3.1.5 · +2 more

  • ICSA-22-069-09 CISA1 known affected

    Siemens SINEC INS

    SINEC INS

  • SSA-389290 Siemens ProductCERT1 known affected

    SSA-389290: Third-Party Component Vulnerabilities in SINEC INS

    SINEC INS

  • RHSA-2021:2472 Red Hat Product Security143 products fixed

    Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP8 security update

2 more advisories

Full record on NVD

Fix

  1. Update Apple mac os x to 10.15.7 · 10.14.6
  2. Vendor fix Siemens ProductCERT SSA-398330 · 1 productUpdate to V3.1.5 or later version
  3. Vendor fix CISA ICSA-23-348-10 · 5 productsUpdate to V3.1.5 or later version
  4. Vendor fix Siemens ProductCERT SSA-389290 · 1 productUpdate to V1.0.1.1 or later version
  5. Vendor fix CISA ICSA-22-069-09 · 1 productUpdate to V1.0.1.1 or later version
  6. Vendor fix Red Hat Product Security RHSA-2021:2472 · 143 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the httpd daemon will be restarted automatically. Applications using the APR libraries, such as httpd, must be …
  7. Vendor fix Red Hat Product Security RHSA-2021:2471 · 1 productBefore applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on. The References section of this erratum contains a download link for the update. You must be logged in to download the update.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2026-04-16
  • CISA-ADPCVSS 3.17.52026-04-16
  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-674known since 2026-10-23
  • NVDweakness (CWE)CWE-674, CWE-787read 2026-10-23
  • FIRST EPSSEPSS score9.8 %2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2020-12-14
Last Modified
2026-10-14
NVD status
Modified
GitHub Advisory
GHSA-4p2h-jggv-23jg

Frequently asked questions

What is CVE-2020-8285?

curl 7.21.0 to and including 7.73.0 is vulnerable to uncontrolled recursion due to a stack overflow issue in FTP wildcard match parsing.

Is CVE-2020-8285 actively exploited?

A proof-of-concept exploit exists for CVE-2020-8285, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2020-8285?

CVE-2020-8285 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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