CVE-2020-12283 : Sourcegraph before 3.15.1 has a vulnerable authentication workflow because of im

Sourcegraph before 3.15.1 has a vulnerable authentication workflow because of improper validation in the SafeRedirectURL method in cmd/frontend/auth/redirect.go, such as for the //foo//example.com substring.

Published 2020-04-30 05:15:12

Updated 2021-03-04 21:10:40

Source MITRE

View at NVD, CVE.org

Vulnerability category: Open redirect

Products affected by CVE-2020-12283

Sourcegraph » Sourcegraph
Versions before (<) 3.15.1
cpe:2.3:a:sourcegraph:sourcegraph:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2020-12283

EPSS FAQ

0.26%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 46 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-12283

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.8	MEDIUM	AV:N/AC:M/Au:N/C:P/I:P/A:N	8.6	4.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: None
6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	2.8	2.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2020-12283

CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-12283

https://securitylab.github.com/advisories/GHSL-2020-085-sourcegraph

GHSL-2020-085: Open redirect vulnerability in Sourcegraph - CVE-2020-12283 - GitHub Security Lab
Exploit;Third Party Advisory
https://github.com/sourcegraph/sourcegraph/blob/master/CHANGELOG.md

sourcegraph/CHANGELOG.md at master · sourcegraph/sourcegraph · GitHub
Release Notes;Third Party Advisory
https://github.com/sourcegraph/sourcegraph/commit/c0f48172e815c7f66471a38f0a06d1fc32a77a64

auth: ensure the redirect URL always starts with a single slash (#10167) · sourcegraph/sourcegraph@c0f4817 · GitHub
Patch;Third Party Advisory
https://github.com/sourcegraph/sourcegraph/compare/v3.15.0...v3.15.1

Comparing v3.15.0...v3.15.1 · sourcegraph/sourcegraph · GitHub
Release Notes;Third Party Advisory
https://github.com/sourcegraph/sourcegraph/pull/10167

auth: ensure the redirect URL always starts with a single slash by unknwon · Pull Request #10167 · sourcegraph/sourcegraph · GitHub
Patch;Third Party Advisory

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Vulnerability Details : CVE-2020-12283

Products affected by CVE-2020-12283

Exploit prediction scoring system (EPSS) score for CVE-2020-12283

CVSS scores for CVE-2020-12283

CWE ids for CVE-2020-12283

References for CVE-2020-12283