#VU15673 Heap-based buffer overflow in libcurl - CVE-2018-16842

Vulnerability identifier: #VU15673

Vulnerability risk: Low

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

CVE-ID: CVE-2018-16842

CWE-ID: CWE-122

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 heap-based buffer over-read in the tool_msgs.c:voutf() function. A remote unauthenticated attacker can specially crafted data, trigger memory corruption to read back out-of-buffer data and cause the service to crash.

Mitigation
Update to version 7.62.0.

Vulnerable software versions

libcurl: 7.14.1 - 7.61.1

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16842

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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.