CVE

CVE-2023-26483

Date: (C)2023-03-07   (M)2023-12-22

gosaml2 is a Pure Go implementation of SAML 2.0. SAML Service Providers using this library for SAML authentication support are likely susceptible to Denial of Service attacks. A bug in this library enables attackers to craft a `deflate`-compressed request which will consume significantly more memory during processing than the size of the original request. This may eventually lead to memory exhaustion and the process being killed. The maximum compression ratio achievable with `deflate` is 1032:1, so by limiting the size of bodies passed to gosaml2, limiting the rate and concurrency of calls, and ensuring that lots of memory is available to the process it _may_ be possible to help Go's garbage collector "keep up". Implementors are encouraged not to rely on this. This issue is fixed in version 0.9.0.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:		CVSS V2 Severity:
CVSS Score : 5.3		CVSS Score :
Exploit Score: 3.9		Exploit Score:
Impact Score: 1.4		Impact Score:
CVSS V3 Metrics:		CVSS V2 Metrics:
Attack Vector: NETWORK		Access Vector:
Attack Complexity: LOW		Access Complexity:
Privileges Required: NONE		Authentication:
User Interaction: NONE		Confidentiality:
Scope: UNCHANGED		Integrity:
Confidentiality: NONE		Availability:
Integrity: NONE
Availability: LOW

Reference:

https://github.com/russellhaering/gosaml2/commit/f9d66040241093e8702649baff50cc70d2c683c0

https://github.com/russellhaering/gosaml2/releases/tag/v0.9.0

https://github.com/russellhaering/gosaml2/security/advisories/GHSA-6gc3-crp7-25w5

https://pkg.go.dev/vuln/GO-2023-1602