CVE-2018-16840

EUVD-2018-8636
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
redhatCNA
4.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 46%
Affected Products (NVD)
VendorProductVersion
haxxcurl
7.59.0 ≤
𝑥
< 7.62.0
canonicalubuntu_linux
14.04
canonicalubuntu_linux
16.04
canonicalubuntu_linux
18.04
canonicalubuntu_linux
18.10
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
curl
bookworm
7.88.1-10+deb12u7
fixed
bookworm (security)
7.88.1-10+deb12u5
fixed
bullseye
7.74.0-1.3+deb11u13
fixed
bullseye (security)
7.74.0-1.3+deb11u11
fixed
jessie
not-affected
sid
8.10.1-2
fixed
stretch
not-affected
trixie
8.10.1-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
curl
bionic
not-affected
cosmic
Fixed 7.61.0-1ubuntu2.2
released
trusty
not-affected
xenial
not-affected
Common Weakness Enumeration
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/