Heap-based buffer overflow in cURL - CVE-2018-1000300

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

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.

cURL

Arch Linux
Gentoo Linux
Slackware Linux
Ubuntu
Fedora
PeopleSoft Enterprise PeopleTools
Oracle Enterprise Manager Ops Center
openSUSE Leap
curl (Alpine package)
libcurl3 (Ubuntu package)
curl (Ubuntu package)
libcurl3-gnutls (Ubuntu package)
libcurl3-nss (Ubuntu package)
libcurl4 (Ubuntu package)
curl
Oracle Communications WebRTC Session Controller

Update to version 7.60.0.

curl (Alpine package) - update to 7.60.0-r0
libcurl3 (Ubuntu package) - addressed in versions 7.35.0-1ubuntu2.16, 7.47.0-1ubuntu2.8, 7.55.1-1ubuntu2.5
curl (Ubuntu package) - addressed in versions 7.35.0-1ubuntu2.16, 7.47.0-1ubuntu2.8, 7.55.1-1ubuntu2.5, 7.58.0-2ubuntu3.1
libcurl3-gnutls (Ubuntu package) - addressed in versions 7.35.0-1ubuntu2.16, 7.47.0-1ubuntu2.8, 7.55.1-1ubuntu2.5, 7.58.0-2ubuntu3.1
libcurl3-nss (Ubuntu package) - addressed in versions 7.35.0-1ubuntu2.16, 7.47.0-1ubuntu2.8, 7.55.1-1ubuntu2.5, 7.58.0-2ubuntu3.1
libcurl4 (Ubuntu package) - update to 7.58.0-2ubuntu3.1
curl - addressed in versions 7.55.1-11.fc27, 7.59.0-3.fc28
Oracle Communications WebRTC Session Controller - update to 7.2

• https://curl.haxx.se/docs/adv_2018-82c2.html

• 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
• Ubuntu update for curl