csaf_redhat - rhsa-2022

rhsa-2022_1074

Vulnerability from csaf_redhat

Published

2022-03-28 10:37

Modified

2024-11-22 16:30

Summary

Red Hat Security Advisory: screen security update

Notes

Topic

An update for screen is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended Update Support, and Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions. 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 screen utility allows users to have multiple logins on a single terminal. Security Fix(es): * screen: crash when processing combining chars (CVE-2021-26937) 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.

JSON

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  "vulnerabilities": [
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      "cve": "CVE-2021-26937",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2021-02-10T00:00:00+00:00",
      "ids": [
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          "text": "1927062"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in screen. A specially crafted sequence of combining characters could cause an out of bounds write leading to arbitrary code execution. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "screen: crash when processing combining chars",
          "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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            "7Server-7.7.E4S:screen-debuginfo-0:4.1.0-0.25.20120314git3c2946.el7_7.1.ppc64le",
            "7Server-7.7.E4S:screen-debuginfo-0:4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64",
            "7Server-7.7.TUS:screen-0:4.1.0-0.25.20120314git3c2946.el7_7.1.src",
            "7Server-7.7.TUS:screen-0:4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64",
            "7Server-7.7.TUS:screen-debuginfo-0:4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.6,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "7Server-7.7.AUS:screen-0:4.1.0-0.25.20120314git3c2946.el7_7.1.src",
            "7Server-7.7.AUS:screen-0:4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64",
            "7Server-7.7.AUS:screen-debuginfo-0:4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64",
            "7Server-7.7.E4S:screen-0:4.1.0-0.25.20120314git3c2946.el7_7.1.ppc64le",
            "7Server-7.7.E4S:screen-0:4.1.0-0.25.20120314git3c2946.el7_7.1.src",
            "7Server-7.7.E4S:screen-0:4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64",
            "7Server-7.7.E4S:screen-debuginfo-0:4.1.0-0.25.20120314git3c2946.el7_7.1.ppc64le",
            "7Server-7.7.E4S:screen-debuginfo-0:4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64",
            "7Server-7.7.TUS:screen-0:4.1.0-0.25.20120314git3c2946.el7_7.1.src",
            "7Server-7.7.TUS:screen-0:4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64",
            "7Server-7.7.TUS:screen-debuginfo-0:4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "screen: crash when processing combining chars"
    }
  ]
}

cve-2021-26937

Vulnerability from cvelistv5

Published

2021-02-09 19:35

Modified

2024-08-03 20:33

Severity ?

Summary

encoding.c in GNU Screen through 4.8.0 allows remote attackers to cause a denial of service (invalid write access and application crash) or possibly have unspecified other impact via a crafted UTF-8 character sequence.

References

▼	URL	Tags
	https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html	x_refsource_MISC
	https://www.openwall.com/lists/oss-security/2021/02/09/3	x_refsource_MISC
	https://ftp.gnu.org/gnu/screen/	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2021/02/09/8	mailing-list, x_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2021/02/msg00031.html	mailing-list, x_refsource_MLIST
	https://www.debian.org/security/2021/dsa-4861	vendor-advisory, x_refsource_DEBIAN
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/	vendor-advisory, x_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/	vendor-advisory, x_refsource_FEDORA
	https://security.gentoo.org/glsa/202105-11	vendor-advisory, x_refsource_GENTOO

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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