rhsa-2020_1497
Vulnerability from csaf_redhat
Published
2020-04-16 21:09
Modified
2024-11-22 14:32
Summary
Red Hat Security Advisory: tigervnc security update
Notes
Topic
An update for tigervnc is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Moderate. 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):
* tigervnc: Stack use-after-return due to incorrect usage of stack memory in ZRLEDecoder (CVE-2019-15691)
* tigervnc: Heap buffer overflow triggered from CopyRectDecoder due to incorrect value checks (CVE-2019-15692)
* tigervnc: Heap buffer overflow in TightDecoder::FilterGradient (CVE-2019-15693)
* tigervnc: Heap buffer overflow in DecodeManager::decodeRect (CVE-2019-15694)
* tigervnc: Stack buffer overflow in CMsgReader::readSetCursor (CVE-2019-15695)
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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{
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{
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"title": "Vulnerability description"
},
{
"category": "summary",
"text": "tigervnc: Heap buffer overflow in DecodeManager::decodeRect",
"title": "Vulnerability summary"
},
{
"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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"details": "Moderate"
}
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"title": "tigervnc: Heap buffer overflow in DecodeManager::decodeRect"
},
{
"cve": "CVE-2019-15695",
"cwe": {
"id": "CWE-121",
"name": "Stack-based Buffer Overflow"
},
"discovery_date": "2019-12-20T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1790318"
}
],
"notes": [
{
"category": "description",
"text": "TigerVNC version prior to 1.10.1 is vulnerable to stack buffer overflow, which could be triggered from CMsgReader::readSetCursor. This vulnerability occurs due to insufficient sanitization of PixelFormat. Since remote attacker can choose offset from start of the buffer to start writing his values, exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "tigervnc: Stack buffer overflow in CMsgReader::readSetCursor",
"title": "Vulnerability summary"
},
{
"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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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2019-15695"
},
{
"category": "external",
"summary": "RHBZ#1790318",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1790318"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2019-15695",
"url": "https://www.cve.org/CVERecord?id=CVE-2019-15695"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-15695",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-15695"
}
],
"release_date": "2019-12-20T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2020-04-16T21:09:03+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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"title": "tigervnc: Stack buffer overflow in CMsgReader::readSetCursor"
}
]
}
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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.