Vulnerability identifier: #VU44897

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-1498

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
httpclient
Other software / Other software solutions

Vendor: nahi

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

Apache HttpClient 4.x before 4.1.1 in Apache HttpComponents, when used with an authenticating proxy server, sends the Proxy-Authorization header to the origin server, which allows remote web servers to obtain sensitive information by logging this header.

Mitigation
Install update from vendor's website.

Vulnerable software versions

httpclient: 4.0 - 4.1

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External links
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061440.html
http://marc.info/?l=httpclient-users&m=129853896315461&w=2
http://marc.info/?l=httpclient-users&m=129856318011586&w=2
http://marc.info/?l=httpclient-users&m=129857589129183&w=2
http://marc.info/?l=httpclient-users&m=129858274406594&w=2
http://marc.info/?l=httpclient-users&m=129858299106950&w=2
http://openwall.com/lists/oss-security/2011/04/07/7
http://openwall.com/lists/oss-security/2011/04/08/1
http://securityreason.com/securityalert/8298
http://www.apache.org/dist/httpcomponents/httpclient/RELEASE_NOTES-4.1.x.txt
http://www.kb.cert.org/vuls/id/153049
http://www.securityfocus.com/bid/46974
http://bugzilla.redhat.com/show_bug.cgi?id=709531
http://issues.apache.org/jira/browse/HTTPCLIENT-1061

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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.