mod_auth_mellon Logout URL redirect

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in mod_auth_mellon. The impacted element is an unknown function of the component Logout URL Handler. Such manipulation leads to redirect. This vulnerability is uniquely identified as CVE-2021-3639. The attack can be launched remotely. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in mod_auth_mellon (the affected version unknown). It has been rated as critical. Affected by this issue is an unknown part of the component Logout URL Handler. The manipulation with an unknown input 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. CVE summarizes:

A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web application URL that redirects to an external and potentially malicious server. The highest threat from this liability is to confidentiality and integrity.

The weakness was disclosed 08/23/2022 as 42a11261b9dad2e48d70bdff7c53dd57a12db6f5. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2021-3639 since 07/09/2021. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1204.001.

Applying the patch 42a11261b9dad2e48d70bdff7c53dd57a12db6f5 is able to eliminate this problem. The bugfix is ready for download at github.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

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

Physical: No
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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 42a11261b9dad2e48d70bdff7c53dd57a12db6f5

Timelineinfo

07/09/2021 🔍
08/23/2022 +410 days 🔍
08/23/2022 +0 days 🔍
08/23/2022 +0 days 🔍

Sourcesinfo

Advisory: 42a11261b9dad2e48d70bdff7c53dd57a12db6f5
Status: Confirmed

CVE: CVE-2021-3639 (🔍)
GCVE (CVE): GCVE-0-2021-3639
GCVE (VulDB): GCVE-100-206972

Entryinfo

Created: 08/23/2022 08:07
Changes: 08/23/2022 08:07 (39)
Complete: 🔍
Cache ID: 216::103

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