CVE-2023-34205 json
Signature validation bypass in github.com/moov-io/signedxml
published 2023-05-30 3 y ago modified 2026-06-17 4 mo ago also GHSA-jqvr-j2vg-gjrv , GO-2023-1826 , EUVD-2023-1572
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
Summary
In Moov signedxml through 1.0.0, parsing the raw XML (as received) can result in different output than parsing the canonicalized XML. Thus, signature validation can be bypassed via a Signature Wrapping attack (aka XSW).
Patch / fix
- go github.com/moov-io/signedxml 1.1.0
- github.com/moov-io/signedxml#25 pull request
- github.com/moov-io/signedxml/releases/tag/v1.1.0 release
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 21 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| GitHub | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/moov-io/signedxml | <1.1.0 |
1.1.0 |
Classification
- Weakness
-
- CWE-347 Improper Verification of Cryptographic Signature
References
-
github.com
/moov-io/signedxml/pull/25
web
-
github.com
/moov-io/signedxml/issues/23
web, issue-tracking, third-party-advisory, report
-
nvd.nist.gov
/vuln/detail/CVE-2023-34205
advisory
-
github.com
/moov-io/signedxml
package
-
github.com
/moov-io/signedxml/releases/tag/v1.1.0
web
-
pkg.go.dev
/vuln/GO-2023-1826
web
Sources
- CVE List CVE-2023-34205
- GitHub Advisory GHSA-jqvr-j2vg-gjrv
- NVD CVE-2023-34205
- OSV GO-2023-1826
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.