#VU17457 Heap out-of-bounds read in libcurl - CVE-2018-16890
Vulnerability identifier: #VU17457
Vulnerability risk: Low
CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2018-16890
CWE-ID:
CWE-125
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
libcurl
Universal components / Libraries /
Libraries used by multiple products
Vendor: curl.haxx.se
Description
The vulnerability allows a remote attacker to gain access to potentially sensitive information or cause the service to crash.
The vulnerability exists due to a integer overflow in the function handling incoming NTLM type-2 messages (`lib/vauth/ntlm.c:ntlm_decode_type2_target`) does not validate incoming data correctly. A remote attacker on malicious or broken NTLM server can trick the victim into accepting a bad length + offset combination, trigger heap out-of-bounds read error and read contents of memory on the system or cause the service to crash..
Mitigation
Update to version 7.64.0.
Vulnerable software versions
libcurl: 7.36.0 - 7.63.0
External links
https://www.securityfocus.com/bid/106947
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16890
https://curl.haxx.se/docs/CVE-2018-16890.html
https://usn.ubuntu.com/3882-1/
https://www.debian.org/security/2019/dsa-4386
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
