Use After Free Affecting curl package, versions <7.62.0-r0


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.56% (78th percentile)

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  • Snyk IDSNYK-ALPINE315-CURL-1926612
  • published2 Dec 2018
  • disclosed31 Oct 2018

Introduced: 31 Oct 2018

CVE-2018-16840  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Alpine:3.15 curl to version 7.62.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Alpine. See How to fix? for Alpine:3.15 relevant fixed versions and status.

A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the Curl_close() function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.