Heap Use-After-Free Vulnerability in cURL by Daniel Stenberg
CVE-2018-16840

9.8CRITICAL

Key Information:

Vendor

The Curl Project

Status
Curl
Vendor
CVE Published:
31 October 2018

What is CVE-2018-16840?

A heap use-after-free vulnerability exists in cURL versions 7.59.0 to 7.61.1. The issue arises in the handling of 'easy' handles, where the Curl_close() function improperly frees a struct without nullifying its pointer. This oversight can lead to unintentional writes to fields in memory that have already been freed, potentially causing application instability or other unintended behaviors.

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Affected Version(s)

curl from 7.59.0 to 7.61.1

References

https://security.gentoo.org/glsa/201903-03
vendor-advisoryx_refsource_GENTOO
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840
x_refsource_CONFIRM
https://github.com/curl/curl/commit/81d135d67155c5295b103...
x_refsource_CONFIRM

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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