#VU31436 Data Handling in Glibc - CVE-2015-8985

Vulnerability identifier: #VU31436

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-8985

CWE-ID: CWE-19

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 non-authenticated attacker to perform a denial of service (DoS) attack.

The pop_fail_stack function in the GNU C Library (aka glibc or libc6) allows context-dependent attackers to cause a denial of service (assertion failure and application crash) via vectors related to extended regular expression processing.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Glibc: 2.0 - 2.27.9000

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External links
https://www.openwall.com/lists/oss-security/2017/02/14/9
https://www.securityfocus.com/bid/76916
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=779392
https://security.gentoo.org/glsa/201908-06

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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.