GitHub Advisoryadvisory · Go

GHSA-6gc3-crp7-25w5 gosaml2 vulnerable to Denial Of Service Via Deflate Decompression Bomb

MEDIUM Published 2023-03-02 Modified 2024-05-20 Official page ↗
Aliases
CVE-2023-26483
Ecosystem
Go
Packages
github.com/russellhaering/gosaml2
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-409
Reviewed
2023-03-02

Affected packages

• Go github.com/russellhaering/gosaml2: < 0.9.0 → fixed in 0.9.0

Description

Impact 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. Mitigation 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. Patches This issue is addressed in v0.9.0

Related

Alias · CVE (1)

  • CVE-2023-26483 gosaml2 is a Pure Go implementation of SAML 2.0. vulnerability

Weakness · CWE (1)

  • CWE-409 Improper Handling of Highly Compressed Data (Data Amplification) weakness

References