rhsa-2024_0621
Vulnerability from csaf_redhat
Published
2024-01-30 16:13
Modified
2024-11-06 14:59
Summary
Red Hat Security Advisory: tigervnc security update
Notes
Topic
An update for tigervnc is now available for Red Hat Enterprise Linux 8.6 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients.
Security Fix(es):
* xorg-x11-server: Heap buffer overflow in DeviceFocusEvent and ProcXIQueryPointer (CVE-2023-6816)
* xorg-x11-server: reattaching to different master device may lead to out-of-bounds memory access (CVE-2024-0229)
* xorg-x11-server: heap buffer overflow in XISendDeviceHierarchyEvent (CVE-2024-21885)
* xorg-x11-server: heap buffer overflow in DisableDevice (CVE-2024-21886)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"text": "The Xorg server does not run with root privileges in Red Hat Enterprise Linux 8 and 9, therefore, Red Hat Enterprise Linux 8 and 9 have been rated with a moderate severity.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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"baseScore": 9.8,
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"title": "xorg-x11-server: Heap buffer overflow in DeviceFocusEvent and ProcXIQueryPointer"
},
{
"acknowledgments": [
{
"names": [
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],
"organization": "Trend Micro Zero Day Initiative",
"summary": "Acknowledged by upstream."
}
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"cwe": {
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"name": "Access of Memory Location After End of Buffer"
},
"discovery_date": "2024-01-03T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2256690"
}
],
"notes": [
{
"category": "description",
"text": "An out-of-bounds memory access flaw was found in the X.Org server. This issue can be triggered when a device frozen by a sync grab is reattached to a different master device. This issue may lead to an application crash, local privilege escalation (if the server runs with extended privileges), or remote code execution in SSH X11 forwarding environments.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "xorg-x11-server: reattaching to different master device may lead to out-of-bounds memory access",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Xorg server does not run with root privileges in Red Hat Enterprise Linux 8 and 9, therefore, Red Hat Enterprise Linux 8 and 9 have been rated with a Moderate severity.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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{
"category": "external",
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}
],
"release_date": "2024-01-16T00:00:00+00:00",
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
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{
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"details": "Important"
}
],
"title": "xorg-x11-server: reattaching to different master device may lead to out-of-bounds memory access"
},
{
"acknowledgments": [
{
"names": [
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],
"organization": "Trend Micro Zero Day Initiative"
}
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"cwe": {
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"name": "Heap-based Buffer Overflow"
},
"discovery_date": "2024-01-02T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2256540"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in X.Org server. In the XISendDeviceHierarchyEvent function, it is possible to exceed the allocated array length when certain new device IDs are added to the xXIHierarchyInfo struct. This can trigger a heap buffer overflow condition, which may lead to an application crash or remote code execution in SSH X11 forwarding environments.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "xorg-x11-server: heap buffer overflow in XISendDeviceHierarchyEvent",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Xorg server does not run with root privileges in Red Hat Enterprise Linux 8 and 9, therefore, Red Hat Enterprise Linux 8 and 9 have been rated with a moderate severity.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2024-21885",
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}
],
"release_date": "2024-01-16T00:00:00+00:00",
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"date": "2024-01-30T16:13:28+00:00",
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{
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"details": "Important"
}
],
"title": "xorg-x11-server: heap buffer overflow in XISendDeviceHierarchyEvent"
},
{
"acknowledgments": [
{
"names": [
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"organization": "Trend Micro Zero Day Initiative"
}
],
"cve": "CVE-2024-21886",
"cwe": {
"id": "CWE-122",
"name": "Heap-based Buffer Overflow"
},
"discovery_date": "2024-01-02T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2256542"
}
],
"notes": [
{
"category": "description",
"text": "A heap buffer overflow flaw was found in the DisableDevice function in the X.Org server. This issue may lead to an application crash or, in some circumstances, remote code execution in SSH X11 forwarding environments.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "xorg-x11-server: heap buffer overflow in DisableDevice",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Xorg server does not run with root privileges in Red Hat Enterprise Linux 8 and 9, therefore, Red Hat Enterprise Linux 8 and 9 have been rated with a moderate severity.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
"category": "external",
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}
],
"release_date": "2024-01-16T00:00:00+00:00",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "xorg-x11-server: heap buffer overflow in DisableDevice"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.