Heap-based buffer overflow in cURL - CVE-2018-1000300
Published: May 17, 2018 / Updated: May 17, 2018
Vulnerability identifier: #VU12799
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-2018-1000300
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to heap-based buffer overflow when closing down an FTP connection with very long server command replies. When doing FTP transfers, curl keeps a spare "closure handle" around internally that will be used when an FTP connection gets shut down since the original curl easy handle is then already removed. FTP server response data that gets cached from the original transfer might then be larger than the default buffer size (16 KB) allocated in the "closure handle", which can lead to buffer overwrite. A remote attacker can execute arbitrary code.
Successful exploitation of the vulnerability may result in system compromise.
The weakness exists due to heap-based buffer overflow when closing down an FTP connection with very long server command replies. When doing FTP transfers, curl keeps a spare "closure handle" around internally that will be used when an FTP connection gets shut down since the original curl easy handle is then already removed. FTP server response data that gets cached from the original transfer might then be larger than the default buffer size (16 KB) allocated in the "closure handle", which can lead to buffer overwrite. A remote attacker can execute arbitrary code.
Successful exploitation of the vulnerability may result in system compromise.
Affected software
cURL
Arch Linux
Gentoo Linux
Slackware Linux
Fedora
curl (Alpine package)
openSUSE Leap
curl
PeopleSoft Enterprise PeopleTools
Oracle Enterprise Manager Ops Center
Oracle Communications WebRTC Session Controller
Arch Linux
Gentoo Linux
Slackware Linux
Fedora
curl (Alpine package)
openSUSE Leap
curl
PeopleSoft Enterprise PeopleTools
Oracle Enterprise Manager Ops Center
Oracle Communications WebRTC Session Controller
How to mitigate CVE-2018-1000300
Update to version 7.60.0.
curl (Alpine package) - update to 7.60.0-r0
Oracle Communications WebRTC Session Controller - update to 7.2
curl - addressed in versions 7.55.1-11.fc27, 7.59.0-3.fc28
Oracle Communications WebRTC Session Controller - update to 7.2
curl - addressed in versions 7.55.1-11.fc27, 7.59.0-3.fc28
External References
Related Security Bulletins
- Slackware Linux update for curl
- Arch Linux update for libcurl-gnutls
- Arch Linux update for curl
- Arch Linux update for lib32-curl
- Arch Linux update for lib32-libcurl-compat
- Arch Linux update for libcurl-compat
- Arch Linux update for lib32-libcurl-gnutls
- OpenSUSE Linux update for curl
- Gentoo update for cURL
- Heap-based buffer overflow in curl (Alpine package)
- Fedora 27 update for curl
- Fedora 28 update for curl
- Multiple vulnerabilities in PeopleSoft Enterprise PeopleTools
- Multiple vulnerabilities in Oracle Enterprise Manager Ops Center
- Multiple vulnerabilities in Oracle Communications WebRTC Session Controller