Vulnerability Details CVE-2018-16840
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 62.0%
CVSS Severity
CVSS v3 Score 4.3
CVSS v2 Score 7.5
References
- http://www.securitytracker.com/id/1042013
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840
- https://curl.haxx.se/docs/CVE-2018-16840.html
- https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f
- https://security.gentoo.org/glsa/201903-03
- https://usn.ubuntu.com/3805-1/
- http://www.securitytracker.com/id/1042013
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840
- https://curl.haxx.se/docs/CVE-2018-16840.html
- https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f
- https://security.gentoo.org/glsa/201903-03
- https://usn.ubuntu.com/3805-1/
Products affected by CVE-2018-16840
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cpe:2.3:a:haxx:curl:7.59.0
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cpe:2.3:a:haxx:curl:7.60.0
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cpe:2.3:a:haxx:curl:7.61.0
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cpe:2.3:a:haxx:curl:7.61.1
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cpe:2.3:o:canonical:ubuntu_linux:14.04
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cpe:2.3:o:canonical:ubuntu_linux:16.04
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cpe:2.3:o:canonical:ubuntu_linux:18.04
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cpe:2.3:o:canonical:ubuntu_linux:18.10