csaf_redhat - rhsa-2020

rhsa-2020_1335

Vulnerability from csaf_redhat

Published

2020-04-06 16:33

Modified

2024-11-22 14:42

Summary

Red Hat Security Advisory: telnet security update

Notes

Topic

An update for telnet 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

Telnet is a popular protocol for logging in to remote systems over the Internet. The telnet-server packages include a telnet service that supports remote logins into the host machine. The telnet service is disabled by default. 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.

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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      "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": [
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          "category": "vendor_fix",
          "date": "2020-04-06T16:33:30+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": {
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          "details": "When in enforcing mode, SELinux as configured in Red Hat Enterprise Linux provides some mitigation against an exploit for telnet-server, because it limits the kind of operations it can perform and programs that can be run from the telnet-server\u0027s context.",
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      "scores": [
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            "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"
    }
  ]
}

cve-2020-10188

Vulnerability from cvelistv5

Published

2020-03-06 14:07

Modified

2024-08-04 10:58

Severity ?

Summary

utility.c in telnetd in netkit telnet through 0.17 allows remote attackers to execute arbitrary code via short writes or urgent data, because of a buffer overflow involving the netclear and nextitem functions.

References

▼	URL	Tags
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HLU6FL24BSQQEB2SJC26NLJ2MANQDA7M/	vendor-advisory, x_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7FMTRRQTYKWZD2GMXX3GLZV46OLPCLVK/	vendor-advisory, x_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3VJ6V2Z3JRNJOBVHSOPMAC76PSSKG6A/	vendor-advisory, x_refsource_FEDORA
	https://lists.debian.org/debian-lts-announce/2020/05/msg00012.html	mailing-list, x_refsource_MLIST
	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-telnetd-EFJrEzPx	vendor-advisory, x_refsource_CISCO
	https://lists.debian.org/debian-lts-announce/2020/08/msg00038.html	mailing-list, x_refsource_MLIST
	https://www.oracle.com/security-alerts/cpuApr2021.html	x_refsource_MISC
	https://appgateresearch.blogspot.com/2020/02/bravestarr-fedora-31-netkit-telnetd_28.html	x_refsource_MISC
	https://github.com/krb5/krb5-appl/blob/d00cd671dfe945791b33d4f1f6a5c57ae1667ef8/telnet/telnetd/utility.c#L205-L216	x_refsource_MISC
	https://www.arista.com/en/support/advisories-notices/security-advisories/10702-security-advisory-48	x_refsource_MISC

Impacted products

Vendor

Product

Version

▼

n/a

Version: n/a

Show details on NVD website

JSON

To clipboard

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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.

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