Double Free in cURL - CVE-2016-8618
Published: July 31, 2018 / Updated: August 3, 2020
Vulnerability identifier: #VU33017
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-8618
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
The libcurl API function called `curl_maprintf()` before version 7.51.0 can be tricked into doing a double-free due to an unsafe `size_t` multiplication, on systems using 32 bit `size_t` variables.
Affected software
cURL
Amazon Linux AMI
Arch Linux
SUSE Linux
Slackware Linux
Fedora
Opensuse
Modular Switchgear Monitoring (MSM)
curl (Alpine package)
curl
Dell EMC Unisphere Central
Amazon Linux AMI
Arch Linux
SUSE Linux
Slackware Linux
Fedora
Opensuse
Modular Switchgear Monitoring (MSM)
curl (Alpine package)
curl
Dell EMC Unisphere Central
How to mitigate CVE-2016-8618
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/94098
- 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-2016-8618
- https://curl.haxx.se/docs/adv_20161102D.html
- https://security.gentoo.org/glsa/201701-47
- https://www.tenable.com/security/tns-2016-21
Related Security Bulletins
- Double Free in curl.haxx.se cURL
- OpenSUSE Linux update for curl
- SUSE Linux update for curl
- SUSE Linux update for curl
- Double Free in curl (Alpine package)
- Arch Linux update for lib32-libcurl-gnutls
- 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 Hitachi Energy MSM Product
- Multiple vulnerabilities in Dell EMC Unisphere Central
- Fedora 24 update for curl
- Fedora 25 update for curl