Use-after-free in cURL - CVE-2016-8623
Published: August 1, 2018 / Updated: August 3, 2020
Vulnerability identifier: #VU33013
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-8623
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
A flaw was found in curl before version 7.51.0. The way curl handles cookies permits other threads to trigger a use-after-free leading to information disclosure.
Affected software
cURL
Amazon Linux AMI
Arch Linux
SUSE Linux
Slackware Linux
Fedora
Opensuse
curl (Alpine package)
curl
Dell EMC Unisphere Central
Amazon Linux AMI
Arch Linux
SUSE Linux
Slackware Linux
Fedora
Opensuse
curl (Alpine package)
curl
Dell EMC Unisphere Central
How to mitigate CVE-2016-8623
Install update from vendor's website.
cURL - update to 7.51.0
curl (Alpine package) - addressed in versions 7.49.1-r4, 7.51.0-r0
Dell EMC Unisphere Central - update to 4.0.8.23220
curl - addressed in versions 7.47.1-9.fc24, 7.51.0-1.fc25
curl (Alpine package) - addressed in versions 7.49.1-r4, 7.51.0-r0
Dell EMC Unisphere Central - update to 4.0.8.23220
curl - addressed in versions 7.47.1-9.fc24, 7.51.0-1.fc25
External References
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- http://www.securityfocus.com/bid/94106
- http://www.securitytracker.com/id/1037192
- https://access.redhat.com/errata/RHSA-2018:2486
- https://access.redhat.com/errata/RHSA-2018:3558
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8623
- https://curl.haxx.se/CVE-2016-8623.patch
- https://curl.haxx.se/docs/adv_20161102I.html
- https://security.gentoo.org/glsa/201701-47
- https://www.tenable.com/security/tns-2016-21
Related Security Bulletins
- Use-after-free in curl.haxx.se cURL
- OpenSUSE Linux update for curl
- SUSE Linux update for curl
- SUSE Linux update for curl
- Use-after-free in curl (Alpine package)
- Arch Linux update for lib32-libcurl-gnutls
- Arch Linux update for libcurl-gnutls
- Arch Linux update for libcurl-compat
- Arch Linux update for curl
- Arch Linux update for lib32-libcurl-compat
- Arch Linux update for lib32-curl
- Amazon Linux AMI update for curl
- Slackware Linux update for curl
- Multiple vulnerabilities in Dell EMC Unisphere Central
- Fedora 24 update for curl
- Fedora 25 update for curl