RHSA-2024:2298
Vulnerability from csaf_redhat - Published: 2024-04-30 10:38 - Updated: 2026-03-18 02:32Summary
Red Hat Security Advisory: tigervnc security update
Severity
Important
Notes
Topic: An update for tigervnc is now available for Red Hat Enterprise Linux 9.
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: Use-after-free bug in DamageDestroy (CVE-2023-5574)
* xorg-x11-server: Use-after-free bug in DestroyWindow (CVE-2023-5380)
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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.4 Release Notes linked from 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.
A use-after-free flaw was found in the xorg-x11-server. An X server crash may occur in a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode) if the pointer is warped from within a window on one screen to the root window of the other screen and if the original window is destroyed followed by another window being destroyed.
4.7 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2024:2298
A use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode). If the pointer is warped from a screen 1 to a screen 0, a use-after-free issue may be triggered during shutdown or reset of the Xvfb server, allowing for possible escalation of privileges or denial of service.
7.0 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2024:2298
Workaround
Starting Xvfb with the -noreset command line option limits the use-after-free from being triggered only at the Xvfb server shutdown. Also, do not start Xvfb as root.
References
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-5574"
},
{
"category": "external",
"summary": "RHBZ#2244735",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2244735"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2023-5574",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-5574"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-5574",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-5574"
},
{
"category": "external",
"summary": "https://lists.x.org/archives/xorg-announce/2023-October/003430.html",
"url": "https://lists.x.org/archives/xorg-announce/2023-October/003430.html"
}
],
"release_date": "2023-10-25T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2024-04-30T10:38:08+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2024:2298"
},
{
"category": "workaround",
"details": "Starting Xvfb with the -noreset command line option limits the use-after-free from being triggered only at the Xvfb server shutdown. Also, do not start Xvfb as root.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/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: Use-after-free bug in DamageDestroy"
}
]
}
Loading…
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Sightings
| Author | Source | Type | Date |
|---|
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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