CVE-2018-16840

Summary

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.

Affected Software

Weaknesses

• CWE-416: CWE-416

ADP Enrichment

CVE Program Container

Additional References

• https://security.gentoo.org/glsa/201903-03
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840
• https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f
• http://www.securitytracker.com/id/1042013
• https://curl.haxx.se/docs/CVE-2018-16840.html
• https://usn.ubuntu.com/3805-1/

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://security.gentoo.org/glsa/201903-03
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840
• https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f
• http://www.securitytracker.com/id/1042013
• https://curl.haxx.se/docs/CVE-2018-16840.html
• https://usn.ubuntu.com/3805-1/

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