Vulnerability Details : CVE-2023-26483
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.
Vulnerability category: Denial of service
Products affected by CVE-2023-26483
- cpe:2.3:a:gosaml2_project:gosaml2:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-26483
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 47 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-26483
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
3.9
|
1.4
|
NIST | |
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
3.9
|
1.4
|
GitHub, Inc. |
CWE ids for CVE-2023-26483
-
The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.Assigned by: security-advisories@github.com (Secondary)
References for CVE-2023-26483
-
https://github.com/russellhaering/gosaml2/releases/tag/v0.9.0
Release v0.9.0 · russellhaering/gosaml2 · GitHubRelease Notes
-
https://github.com/russellhaering/gosaml2/security/advisories/GHSA-6gc3-crp7-25w5
Denial Of Service Via Deflate Decompression Bomb · Advisory · russellhaering/gosaml2 · GitHubVendor Advisory
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https://github.com/russellhaering/gosaml2/commit/f9d66040241093e8702649baff50cc70d2c683c0
Merge pull request from GHSA-6gc3-crp7-25w5 · russellhaering/gosaml2@f9d6604 · GitHubPatch
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https://pkg.go.dev/vuln/GO-2023-1602
GO-2023-1602 - Go PackagesThird Party Advisory
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