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NVD / CVE Program· CNA hackerone

CVE-2020-8177: curl 7.20.0 through 7.70.0 is vulnerable to improper restriction of names for files and other resources that can lead too overwriting a loca

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 70.3% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: curl (Alpine:v3.10) 7.66.0-r1; curl (Alpine:v3.11) 7.67.0-r1; curl (Alpine:v3.12) 7.69.1-r1.
  • Mentioned 5 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to curl (Alpine:v3.10) 7.66.0-r1; curl (Alpine:v3.11) 7.67.0-r1; curl (Alpine:v3.12) 7.69.1-r1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

curl 7.20.0 through 7.70.0 is vulnerable to improper restriction of names for files and other resources that can lead too overwriting a local file when the -J flag is used.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Dec 14, 2020
Updated
Oct 14, 2026
EPSS
1.2% · 70th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.8
CNA · hackerone
7.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-8177

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
haxxcurl
debiandebian linux
fujitsum10-1 firmware
fujitsum10-1
fujitsum10-4 firmware
fujitsum10-4
fujitsum10-4s firmware
fujitsum10-4s
fujitsum12-1 firmware
fujitsum12-1
fujitsum12-2 firmware
fujitsum12-2

and 4 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux10.0
  • fujitsu m10-1 firmwarebefore xcp3110
  • fujitsu m10-1 firmwarebefore xcp2410
  • fujitsu m10-4 firmwarebefore xcp3110
  • fujitsu m10-4 firmwarebefore xcp2410
  • fujitsu m10-4s firmwarebefore xcp2410
  • fujitsu m10-4s firmwarebefore xcp3110
  • fujitsu m12-1 firmwarebefore xcp2410
  • fujitsu m12-1 firmwarebefore xcp3110
  • fujitsu m12-2 firmwarebefore xcp3110
  • fujitsu m12-2 firmwarebefore xcp2410
  • fujitsu m12-2s firmwarebefore xcp2410
  • fujitsu m12-2s firmwarebefore xcp3110
  • haxx curl7.20.0 and later · up to 7.70.0 inclusive
  • siemens sinec infrastructure network servicesbefore 1.0.1.1
  • splunk universal forwarder8.2.0 and later · before 8.2.12
  • splunk universal forwarder9.0.0 and later · before 9.0.6
  • splunk universal forwarder9.1.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (hackerone). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a https://github.com/curl/curl

    • curl 7.20.0 to and including 7.70.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.10curlfrom 7.20.0 · before 7.66.0-r17.66.0-r1
Alpine:v3.11curlfrom 7.20.0 · before 7.67.0-r17.67.0-r1
Alpine:v3.12curlfrom 7.20.0 · before 7.69.1-r17.69.1-r1
Alpine:v3.13curlfrom 7.20.0 · before 7.71.0-r07.71.0-r0
Alpine:v3.9curlfrom 7.20.0 · before 7.64.0-r47.64.0-r4
Debian:10curlbefore 7.64.0-4+deb10u27.64.0-4+deb10u2
Debian:12curlbefore 7.72.0-17.72.0-1
Debian:9curlbefore 7.52.1-5+deb9u117.52.1-5+deb9u11
openSUSE:Leap 15.1curlbefore 7.60.0-lp151.5.12.17.60.0-lp151.5.12.1
openSUSE:Leap 15.1curl-minibefore 7.60.0-lp151.5.12.17.60.0-lp151.5.12.1
openSUSE:Leap 15.2curlbefore 7.66.0-lp152.3.3.17.66.0-lp152.3.3.1
openSUSE:Leap 15.2curl-minibefore 7.66.0-lp152.3.3.17.66.0-lp152.3.3.1
Red Hat:enterprise_linux:7::clientcurlbefore 0:7.29.0-59.el7_9.10:7.29.0-59.el7_9.1
Red Hat:enterprise_linux:7::clientcurl-debuginfobefore 0:7.29.0-59.el7_9.10:7.29.0-59.el7_9.1
Red Hat:enterprise_linux:7::clientlibcurlbefore 0:7.29.0-59.el7_9.10:7.29.0-59.el7_9.1
Red Hat:enterprise_linux:7::clientlibcurl-develbefore 0:7.29.0-59.el7_9.10:7.29.0-59.el7_9.1
Red Hat:enterprise_linux:8::baseoscurlbefore 0:7.61.1-14.el80:7.61.1-14.el8
Red Hat:enterprise_linux:8::baseoscurl-debuginfobefore 0:7.61.1-14.el80:7.61.1-14.el8
Red Hat:enterprise_linux:8::baseoscurl-debugsourcebefore 0:7.61.1-14.el80:7.61.1-14.el8
Red Hat:enterprise_linux:8::baseoscurl-minimal-debuginfobefore 0:7.61.1-14.el80:7.61.1-14.el8
Red Hat:enterprise_linux:8::baseoslibcurlbefore 0:7.61.1-14.el80:7.61.1-14.el8
Red Hat:enterprise_linux:8::baseoslibcurl-debuginfobefore 0:7.61.1-14.el80:7.61.1-14.el8
Red Hat:enterprise_linux:8::baseoslibcurl-develbefore 0:7.61.1-14.el80:7.61.1-14.el8
Red Hat:enterprise_linux:8::baseoslibcurl-minimalbefore 0:7.61.1-14.el80:7.61.1-14.el8

+17

Same product

haxx: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-22901curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session t
    51Plan
  • CVE-2023-38039When curl retrieves an HTTP response, it stores the incoming headers so that they can be accessed later via the libcurl headers API.
    47Plan
  • CVE-2024-2398HTTP/2 push headers memory-leak
    45Plan

Published before and after this one in the same product

  • ← EarlierCVE-2019-5482Sep 16, 2019 · Heap buffer overflow in the TFTP protocol handler in cURL 7.19.4 to 7.65.3.
    44Plan
  • ← EarlierCVE-2020-8169Dec 14, 2020 · curl 7.62.0 through 7.70.0 is vulnerable to an information disclosure vulnerability that can lead to a partial password being leaked over th
    31Monitor
  • Later →CVE-2020-8284Dec 14, 2020 · A malicious server can use the FTP PASV response to trick curl 7.73.0 and earlier into connecting back to a given IP address and port, and t
    15Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:curl7.66.0-r1 · Alpine:v3.10Package registry (OSV)
debian:curl7.72.0-1 · Debian:12Package registry (OSV)
opensuse:curl7.66.0-lp152.3.3.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:curl-mini7.66.0-lp152.3.3.1 · openSUSE:Leap 15.2Package registry (OSV)
red hat:curl0:7.61.1-14.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:curl-debuginfo0:7.61.1-14.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:curl-debugsource0:7.61.1-14.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:curl-minimal-debuginfo0:7.61.1-14.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:libcurl0:7.61.1-14.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:libcurl-debuginfo0:7.61.1-14.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:libcurl-devel0:7.61.1-14.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:libcurl-minimal0:7.61.1-14.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:libcurl-minimal-debuginfo0:7.61.1-14.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
suse:curl7.37.0-70.47.1 · SUSE:Linux Enterprise Point of Sale 11 SP3Package registry (OSV)
suse:curl-openssl17.37.0-70.47.1 · SUSE:Linux Enterprise Server 11-SECURITYPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No history yet (it accumulates with the daily EPSS job).

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 researchers

Finders, 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-99 · Improper Control of Resource Identifiers ('Resource Injection')

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records