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Noroxi
CVE-2019-5436· NVD / CVE Program· CNA hackerone

A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1.

Noroxi assessment

Priority: Plan (action score 46/100)

  • 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: 49.7% (FIRST EPSS); higher than 98.8% 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) 7.65.0-r0; curl (Alpine:v3.9) 7.64.0-r2; curl (Debian:12) 7.64.0-4.
  • Mentioned 5 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Add it to your regular patch cycle. Upgrade to curl (Alpine:v3.10) 7.65.0-r0; curl (Alpine:v3.9) 7.64.0-r2; curl (Debian:12) 7.64.0-4 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

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 28, 2019
Updated
Oct 14, 2026
EPSS
49.7% · 98th percentile

Report tools

JSON

Action score

46

Plan

Add it to your regular patch cycle.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
15 / 30 · 49.7%

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-2019-5436

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

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

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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
haxxlibcurl
opensuseleap
fedoraprojectfedora
debiandebian linux
f5traffix signaling delivery controller
netapphci management node
netappsolidfire
netappsteelstore cloud integrated storage
oracleenterprise manager ops center
oraclemysql server
oracleoss support tools

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
  • debian debian linux9.0
  • f5 traffix signaling delivery controller5.0.0 and later · up to 5.1.0 inclusive
  • fedoraproject fedora29
  • haxx libcurl7.19.4 and later · up to 7.64.1 inclusive
  • netapp hci management nodeall versions
  • netapp solidfireall versions
  • netapp steelstore cloud integrated storageall versions
  • opensuse leap15.0
  • opensuse leap15.1
  • opensuse leap42.3
  • oracle enterprise manager ops center12.3.3
  • oracle enterprise manager ops center12.4.0
  • oracle mysql serverup to 5.7.27 inclusive
  • oracle mysql server5.7.28 and later · up to 8.0.17 inclusive
  • oracle oss support tools20.0

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.

  • curl curl

    • Fixed in 7.65.0affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
Alpine:v3.10curlbefore 7.65.0-r07.65.0-r0
Alpine:v3.9curlbefore 7.64.0-r27.64.0-r2
Debian:12curlbefore 7.64.0-47.64.0-4
Debian:8curlbefore 7.38.0-4+deb8u157.38.0-4+deb8u15
openSUSE:Leap 15.0curlbefore 7.60.0-lp151.5.3.17.60.0-lp151.5.3.1
openSUSE:Leap 15.0curl-minibefore 7.60.0-lp151.5.3.17.60.0-lp151.5.3.1
Red Hat:enterprise_linux:7::clientcurlbefore 0:7.29.0-57.el70:7.29.0-57.el7
Red Hat:enterprise_linux:7::clientcurl-debuginfobefore 0:7.29.0-57.el70:7.29.0-57.el7
Red Hat:enterprise_linux:7::clientlibcurlbefore 0:7.29.0-57.el70:7.29.0-57.el7
Red Hat:enterprise_linux:7::clientlibcurl-develbefore 0:7.29.0-57.el70:7.29.0-57.el7
Red Hat:enterprise_linux:8::baseoscurlbefore 0:7.61.1-12.el80:7.61.1-12.el8
Red Hat:enterprise_linux:8::baseoscurl-debuginfobefore 0:7.61.1-12.el80:7.61.1-12.el8
Red Hat:enterprise_linux:8::baseoscurl-debugsourcebefore 0:7.61.1-12.el80:7.61.1-12.el8
Red Hat:enterprise_linux:8::baseoscurl-minimal-debuginfobefore 0:7.61.1-12.el80:7.61.1-12.el8
Red Hat:enterprise_linux:8::baseoslibcurlbefore 0:7.61.1-12.el80:7.61.1-12.el8
Red Hat:enterprise_linux:8::baseoslibcurl-debuginfobefore 0:7.61.1-12.el80:7.61.1-12.el8
Red Hat:enterprise_linux:8::baseoslibcurl-develbefore 0:7.61.1-12.el80:7.61.1-12.el8
Red Hat:enterprise_linux:8::baseoslibcurl-minimalbefore 0:7.61.1-12.el80:7.61.1-12.el8
Red Hat:enterprise_linux:8::baseoslibcurl-minimal-debuginfobefore 0:7.61.1-12.el80:7.61.1-12.el8
Red Hat:rhel_eus:7.7::computenodecurlbefore 0:7.29.0-54.el7_7.30:7.29.0-54.el7_7.3
Red Hat:rhel_eus:7.7::computenodecurl-debuginfobefore 0:7.29.0-54.el7_7.30:7.29.0-54.el7_7.3
Red Hat:rhel_eus:7.7::computenodelibcurlbefore 0:7.29.0-54.el7_7.30:7.29.0-54.el7_7.3
Red Hat:rhel_eus:7.7::computenodelibcurl-develbefore 0:7.29.0-54.el7_7.30:7.29.0-54.el7_7.3
SUSE:Linux Enterprise Desktop 12 SP4curlbefore 7.60.0-4.6.17.60.0-4.6.1

+4

Same product

haxx: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-38545This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake.
    63This week
  • CVE-2019-3822libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow.
    43Plan
  • CVE-2018-14618curl before version 7.61.1 is vulnerable to a buffer overrun in the NTLM authentication code.
    42Plan
  • CVE-2016-8622The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`.
    40Plan
  • CVE-2021-22945When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed
    38Monitor
  • CVE-2017-1000257An IMAP FETCH response line indicates the size of the returned data, in number of bytes.
    38Monitor

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:curl7.65.0-r0 · Alpine:v3.10Package registry (OSV)
debian:curl7.64.0-4 · Debian:12Package registry (OSV)
opensuse:curl7.60.0-lp151.5.3.1 · openSUSE:Leap 15.0Package registry (OSV)
opensuse:curl-mini7.60.0-lp151.5.3.1 · openSUSE:Leap 15.0Package registry (OSV)
red hat:curl0:7.29.0-57.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:curl-debuginfo0:7.29.0-57.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:curl-debugsource0:7.61.1-12.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:curl-minimal-debuginfo0:7.61.1-12.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:libcurl0:7.29.0-57.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:libcurl-debuginfo0:7.61.1-12.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:libcurl-devel0:7.29.0-57.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:libcurl-minimal0:7.61.1-12.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:libcurl-minimal-debuginfo0:7.61.1-12.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
suse:curl7.60.0-3.20.1 · SUSE:Linux Enterprise Module for Basesystem 15Package registry (OSV)
suse:curl-openssl17.37.0-70.41.2 · 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.

EPSS, last 120 days

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 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-122 · Heap-based Buffer Overflow

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 (13 more)

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

All records