Input validation error in apache2 (Alpine package)



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-17189
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 apache2 (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU17177

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-2018-17189

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to an error when handling malicious input. A remote attacker can send a specially crafted request bodies in a slow loris way to plain resources and cause the h2 stream for that request unnecessarily occupied a server thread cleaning up that incoming data. 

Mitigation

Install update from vendor's website.

Vulnerable software versions

apache2 (Alpine package): 2.4.23-r0 - 2.4.37-r1

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=9d23763439dabef4a81c7cc9c061b69048df9708
https://git.alpinelinux.org/aports/commit/?id=1d9e0b6cf8ba241e0cc1da807a574470b5aab156
https://git.alpinelinux.org/aports/commit/?id=86686eac58e8b2cd03eb04fdcdab2afdd4871e0c
https://git.alpinelinux.org/aports/commit/?id=b49cc47cb0358234399a4dee1ad276828120df5b
https://git.alpinelinux.org/aports/commit/?id=e82176fd8bf8ac0c0089a9b3daedcd2c52dafea3


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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