Vulnerability identifier: #VU50362

Vulnerability risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-29573

CWE-ID: CWE-787

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 a boundary within the sysdeps/i386/ldbl2mpn.c in the GNU C Library on x86  systems. A remote attacker can pass specially crafted data to the application that uses the vulnerable version of glibc and crash it.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Glibc: 1.00 - 2.22.90

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External links
http://security.gentoo.org/glsa/202101-20
http://security.netapp.com/advisory/ntap-20210122-0004/
http://sourceware.org/bugzilla/show_bug.cgi?id=26649
http://sourceware.org/pipermail/libc-alpha/2020-September/117779.html

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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.