Arbitrary code execution in libcurl

1) Buffer overflow

EUVDB-ID: #VU7114

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-9502

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists on Windows-based and DOS-based systems due to buffer overflow when handling malicious input. A local attacker can supply a specially crafted 'file:' URL without the '//' following the colon character, trigger memory corruption and execute arbitrary code on the target system with the privileges of the application using libcurl.

Successful exploitation of the vulnerability may result in full system compromise.

Mitigation

Update to version 7.54.1.

Vulnerable software versions

libcurl: 7.53.0 - 7.54.0

External links

http://curl.haxx.se/docs/adv_20170614.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.