ubuntu-cve-2020-29509
Vulnerability from osv_ubuntu
Published
2020-12-14 20:15
Modified
2025-10-24 04:48
Summary
Details
The encoding/xml package in Go (all versions) does not correctly preserve the semantics of attribute namespace prefixes during tokenization round-trips, which allows an attacker to craft inputs that behave in conflicting ways during different stages of processing in affected downstream applications.
Severity
9.8 (Critical)
5.6 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
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{
"binary_name": "golang-1.10",
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},
{
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},
{
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}
]
},
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},
"ranges": [
{
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{
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}
],
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}
],
"versions": [
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]
},
{
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{
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},
{
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},
{
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}
]
},
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},
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]
},
{
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},
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},
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{
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"1.6-0ubuntu4",
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"1.6.1-0ubuntu1",
"1.6.2-0ubuntu5~16.04",
"1.6.2-0ubuntu5~16.04.2",
"1.6.2-0ubuntu5~16.04.3",
"1.6.2-0ubuntu5~16.04.4"
]
},
{
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{
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},
"package": {
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},
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"1.10~rc1-1ubuntu1",
"1.10~rc1-2ubuntu1",
"1.10~rc2-1ubuntu1",
"1.10-1ubuntu1",
"1.10.1-1ubuntu2",
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"1.10.4-2ubuntu1~18.04.2"
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},
{
"ecosystem_specific": {
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{
"binary_name": "golang-1.13",
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{
"binary_name": "golang-1.13-go",
"binary_version": "1.13.8-1ubuntu1~18.04.4+esm1"
},
{
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"binary_version": "1.13.8-1ubuntu1~18.04.4+esm1"
}
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},
"package": {
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"name": "golang-1.13",
"purl": "pkg:deb/ubuntu/golang-1.13@1.13.8-1ubuntu1~18.04.4+esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
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}
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},
{
"ecosystem_specific": {
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{
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},
{
"binary_name": "golang-1.8-go",
"binary_version": "1.8.3-2ubuntu1.18.04.1"
},
{
"binary_name": "golang-1.8-go-shared-dev",
"binary_version": "1.8.3-2ubuntu1.18.04.1"
},
{
"binary_name": "golang-1.8-src",
"binary_version": "1.8.3-2ubuntu1.18.04.1"
},
{
"binary_name": "libgolang-1.8-std1",
"binary_version": "1.8.3-2ubuntu1.18.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "golang-1.8",
"purl": "pkg:deb/ubuntu/golang-1.8@1.8.3-2ubuntu1.18.04.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
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]
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{
"ecosystem_specific": {
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{
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{
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]
},
"package": {
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},
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{
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{
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{
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{
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]
},
{
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{
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},
{
"binary_name": "golang-1.13-go",
"binary_version": "1.13.8-1ubuntu2.22.04.2"
},
{
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}
]
},
"package": {
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"name": "golang-1.13",
"purl": "pkg:deb/ubuntu/golang-1.13@1.13.8-1ubuntu2.22.04.2?arch=source\u0026distro=esm-apps/jammy"
},
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{
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"versions": [
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"1.13.8-1ubuntu2.22.04.1",
"1.13.8-1ubuntu2.22.04.1+esm1",
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]
}
],
"aliases": [],
"details": "The encoding/xml package in Go (all versions) does not correctly preserve the semantics of attribute namespace prefixes during tokenization round-trips, which allows an attacker to craft inputs that behave in conflicting ways during different stages of processing in affected downstream applications.",
"id": "UBUNTU-CVE-2020-29509",
"modified": "2025-10-24T04:48:56Z",
"published": "2020-12-14T20:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-29509"
},
{
"type": "REPORT",
"url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/"
},
{
"type": "REPORT",
"url": "https://github.com/russellhaering/gosaml2/security/advisories/GHSA-xhqq-x44f-9fgg"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-29509"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-29509"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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