#VU95177 Uncontrolled Recursion in Glibc - CVE-2019-9192

Vulnerability identifier: #VU95177

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-9192

CWE-ID: CWE-674

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 perform a denial of service (DoS) attack.

The vulnerability exists due to GNU C Library (aka glibc or libc6) check_dst_limits_calc_pos_1 in posix/regexec.c has uncontrolled recursion. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Glibc: 0.1 - 2.29

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External links
https://sourceware.org/bugzilla/show_bug.cgi?id=24269
https://support.f5.com/csp/article/K26346590?utm_source=f5support&%3Butm_medium=RSS

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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.