#VU15672 Use-after-free error in libcurl - CVE-2018-16840

Vulnerability identifier: #VU15672

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-16840

CWE-ID: CWE-416

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 cause DoS condition on the target system.

The vulnerability exists due to use-after-free error in closing an easy handle in the 'Curl_close()' function. A remote unauthenticated attacker can specially crafted data, trigger memory corruption and cause the service to crash.

Mitigation
Update to version 7.62.0.

Vulnerable software versions

libcurl: 7.59.0 - 7.61.1

---

External links
https://curl.haxx.se/docs/CVE-2018-16840.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.