Vulnerability identifier: #VU11545

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-15671

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Glibc
Universal components / Libraries / Libraries used by multiple products

Vendor: GNU

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the glob function in glob.c due to it skips freeing allocated memory when processing the ~ operator with a long user name when invoked with GLOB_TILDE. A remote attacker can trigger memory corruption and cause the service to crash.

Mitigation
Update to version 2.27.

Vulnerable software versions

Glibc: 2.20 - 2.26

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External links
http://sourceware.org/bugzilla/show_bug.cgi?id=22325

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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.