Denial of service in GNU Glibc



Published: 2021-02-07
Risk Medium
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2020-27618
CWE-ID CWE-835
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Glibc
Universal components / Libraries / Libraries used by multiple products

Vendor GNU

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Infinite loop

EUVDB-ID: #VU50404

Risk: Medium

CVSSv3.1: 6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-27618

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop within iconv implementation when processing multi-byte input sequences in IBM1364, IBM1371, IBM1388, IBM1390, IBM1399 encodings. A remote attacker can pass specially crafted data to the application, consume all available system resources and cause denial of service conditions.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Glibc: 2.0 - 2.32.9000

External links

http://security.archlinux.org/advisory/ASA-202102-18


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.



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