cnvd - cnvd-2021-13240

cnvd-2021-13240

Vulnerability from cnvd

Title: GNU Screen拒绝服务漏洞（CNVD-2021-13240）

Description:

GNU Screen是一款由GNU计划开发的用于命令行终端切换的自由软件。用户可以通过该软件同时连接多个本地或远程的命令行会话，并在其间自由切换。

GNU Screen 4.8.0及更早版本中的encoding.c存在拒绝服务漏洞。攻击者可通过特制UTF-8字符序列利用该漏洞导致无效写访问和应用程序崩溃。

Severity: 高

Formal description:

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://ftp.gnu.org/gnu/screen/

Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-26937

Impacted products

Name
Gnu Screen <=4.8.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-26937",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-26937"
    }
  },
  "description": "GNU Screen\u662f\u4e00\u6b3e\u7531GNU\u8ba1\u5212\u5f00\u53d1\u7684\u7528\u4e8e\u547d\u4ee4\u884c\u7ec8\u7aef\u5207\u6362\u7684\u81ea\u7531\u8f6f\u4ef6\u3002\u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u8be5\u8f6f\u4ef6\u540c\u65f6\u8fde\u63a5\u591a\u4e2a\u672c\u5730\u6216\u8fdc\u7a0b\u7684\u547d\u4ee4\u884c\u4f1a\u8bdd\uff0c\u5e76\u5728\u5176\u95f4\u81ea\u7531\u5207\u6362\u3002\n\nGNU Screen 4.8.0\u53ca\u66f4\u65e9\u7248\u672c\u4e2d\u7684encoding.c\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u7279\u5236UTF-8\u5b57\u7b26\u5e8f\u5217\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u65e0\u6548\u5199\u8bbf\u95ee\u548c\u5e94\u7528\u7a0b\u5e8f\u5d29\u6e83\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttps://ftp.gnu.org/gnu/screen/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-13240",
  "openTime": "2021-02-27",
  "products": {
    "product": "Gnu Screen \u003c=4.8.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-26937",
  "serverity": "\u9ad8",
  "submitTime": "2021-02-10",
  "title": "GNU Screen\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2021-13240\uff09"
}

CVE-2021-26937 (GCVE-0-2021-26937)

Vulnerability from cvelistv5

Published

2021-02-09 19:35

Modified

2025-05-09 20:03

Severity ?

CWE

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	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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