Remote code execution in cURL

1) Heap-based buffer overflow

EUVDB-ID: #VU13841

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0500

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists in curl_smtp_escape_eob in lib/smtp.c due to heap-based buffer overflow when a system invokes curl to send data via SMTP and uses a reduced read buffer. A remote unauthenticated attacker can trigger memory corruption and cause the service to crash or execute arbitrary data with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update to version 7.61.0.

Vulnerable software versions

cURL: 7.24.0 - 7.60.0

External links

http://curl.haxx.se/docs/adv_2018-70a2.html

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.