F5 BIG-IP update for glibc

1) Infinite loop

EUVDB-ID: #VU50404

Risk: Medium

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

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

Install update from vendor's website.

Vulnerable software versions

BIG-IP: 11.6.0 HF1 - 16.1.4.3

CPE2.3

• cpe:2.3:h:f5_networks:big-ip:11.6.5.3:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:12.0.0:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:12.1.6:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:13.0.1:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:13.1.5.1:__hotfix-bigip-13.1.5.1.0.20.2-eng3:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:14.0.1.1:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:14.1.5.6:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:15.0.1.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:15.1.8.2:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.0.1.2:*:*:*:*:*:*:*

External links

http://my.f5.com/manage/s/article/K08641512

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.