VDB-80153 · CVE-2015-8597 · SBV-55587

Blue Coat ProxySG/Advanced Secure Gateway Base64 Encoded URL redirect

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k0.00

A vulnerability was found in Blue Coat ProxySG and Advanced Secure Gateway (Firewall Software) (the affected version unknown). It has been rated as critical. This issue affects an unknown part of the component Base64 Encoded URL Handler. The manipulation with the input value http://www.%humbug-URL%.local/bluecoat-splash-API?%BASE64-URL%. leads to a redirect vulnerability. Using CWE to declare the problem leads to CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Open redirect vulnerability in Blue Coat ProxySG 6.5 before 6.5.8.8 and 6.6 and Advanced Secure Gateway (ASG) 6.6 might allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a base64-encoded URL in conjunction with a "clear text" one in a coaching page, as demonstrated by "http://www.%humbug-URL%.local/bluecoat-splash-API?%BASE64-URL%."

The weakness was presented 01/08/2016 (Website). The advisory is shared at bto.bluecoat.com. The identification of this vulnerability is CVE-2015-8597 since 12/17/2015. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1204.001 for this issue.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Vulnerability Center (SBV-55587†).

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.4
VulDB Temp Score: 7.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.4
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Redirect
CWE: CWE-601
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/17/2015 🔍
12/17/2015 +0 days 🔍
01/08/2016 +22 days 🔍
01/08/2016 +0 days 🔍
01/10/2016 +2 days 🔍
01/10/2016 +0 days 🔍
07/02/2022 +2365 days 🔍

Sourcesinfo

Advisory: bto.bluecoat.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8597 (🔍)
SecurityTracker: 1034506
Vulnerability Center: 55587 - Blue Coat ProxySG and ASG Remote Open Redirect of Coaching Pages, Low

Entryinfo

Created: 01/10/2016 08:16 PM
Updated: 07/02/2022 05:51 PM
Changes: 01/10/2016 08:16 PM (56), 06/20/2018 08:45 AM (8), 07/02/2022 05:51 PM (4)
Complete: 🔍
Cache ID: 18:7E5:40

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