Denial of service in httplib2



Published: 2021-02-28
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-21240
CWE-ID CWE-400
Exploitation vector Network
Public exploit N/A
Vulnerable software
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httplib2
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Vendor httplib2

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource exhaustion

EUVDB-ID: #VU50989

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-21240

CWE-ID: CWE-400 - Uncontrolled Resource Consumption ('Resource Exhaustion')

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can trigger resource exhaustion by tricking the application to connect to a malicious server that responds with long series of "xa0" characters in the "www-authenticate" header.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

httplib2: 0.9 - 0.18.1


CPE2.3 External links

http://github.com/httplib2/httplib2/commit/bd9ee252c8f099608019709e22c0d705e98d26bc
http://github.com/httplib2/httplib2/pull/182
http://github.com/httplib2/httplib2/security/advisories/GHSA-93xj-8mrv-444m
http://pypi.org/project/httplib2

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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