rhsa-2020_1349
Vulnerability from csaf_redhat
Published
2020-04-07 10:46
Modified
2024-09-16 03:50
Summary
Red Hat Security Advisory: krb5-appl security update
Notes
Topic
An update for krb5-appl is now available for Red Hat Enterprise Linux 6.
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
The krb5-appl packages contain Kerberos-aware versions of telnet, ftp, rsh, and rlogin clients and servers. Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and trusted third-party, the Key Distribution Center (KDC).
Security Fix(es):
* telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code (CVE-2020-10188)
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": "A vulnerability was found where incorrect bounds checks in the telnet server\u2019s (telnetd) handling of short writes and urgent data, could lead to information disclosure and corruption of heap data. An unauthenticated remote attacker could exploit these bugs by sending specially crafted telnet packets to achieve arbitrary code execution in the telnet server.",
"title": "Vulnerability description"
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{
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"text": "telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code",
"title": "Vulnerability summary"
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{
"category": "other",
"text": "This vulnerability exists in the `telnet-server` package, not in the `telnet` client-side package. For a Red Hat Enterprise Linux host to be vulnerable, it must have telnet-server installed and the telnetd service enabled. Use of telnetd is not recommended, as it is an un-encrypted protocol with cleartext transmission of passwords; alternatives such as openssh are preferred.",
"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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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2020-10188"
},
{
"category": "external",
"summary": "RHBZ#1811673",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1811673"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2020-10188",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-10188"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-10188",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-10188"
}
],
"release_date": "2020-02-28T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"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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{
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"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",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code"
}
]
}
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