Vulnerability-Lookup

CNVD-2021-14756

Vulnerability from cnvd - Published: 2021-03-05

Title

Xterm输入验证错误漏洞

Description

XTerm是一个X Window System上的终端模拟器，用来提供多个独立的SHELL输入输出。 Xterm中存在输入验证错误漏洞，该漏洞源于允许远程攻击者通过特制的UTF-8字符序列造成拒绝服务（分段错误）或可能具有未指明的其他影响。目前没有详细的漏洞细节提供。

Severity

高

Patch Name

Xterm输入验证错误漏洞的补丁

Patch Description

XTerm是一个X Window System上的终端模拟器，用来提供多个独立的SHELL输入输出。 Xterm中存在输入验证错误漏洞，该漏洞源于允许远程攻击者通过特制的UTF-8字符序列造成拒绝服务（分段错误）或可能具有未指明的其他影响。目前没有详细的漏洞细节提供。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://www.debian.org/lts/security/2021/dla-2558

Reference

https://access.redhat.com/errata/RHSA-2021:0611; http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27135

Impacted products

Name
Xterm Xterm

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-27135",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-27135"
    }
  },
  "description": "XTerm\u662f\u4e00\u4e2aX Window System\u4e0a\u7684\u7ec8\u7aef\u6a21\u62df\u5668\uff0c\u7528\u6765\u63d0\u4f9b\u591a\u4e2a\u72ec\u7acb\u7684SHELL\u8f93\u5165\u8f93\u51fa\u3002\n\nXterm\u4e2d\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5141\u8bb8\u8fdc\u7a0b\u653b\u51fb\u8005\u901a\u8fc7\u7279\u5236\u7684UTF-8\u5b57\u7b26\u5e8f\u5217\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u5206\u6bb5\u9519\u8bef\uff09\u6216\u53ef\u80fd\u5177\u6709\u672a\u6307\u660e\u7684\u5176\u4ed6\u5f71\u54cd\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://www.debian.org/lts/security/2021/dla-2558",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-14756",
  "openTime": "2021-03-05",
  "patchDescription": "XTerm\u662f\u4e00\u4e2aX Window System\u4e0a\u7684\u7ec8\u7aef\u6a21\u62df\u5668\uff0c\u7528\u6765\u63d0\u4f9b\u591a\u4e2a\u72ec\u7acb\u7684SHELL\u8f93\u5165\u8f93\u51fa\u3002\r\n\r\nXterm\u4e2d\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5141\u8bb8\u8fdc\u7a0b\u653b\u51fb\u8005\u901a\u8fc7\u7279\u5236\u7684UTF-8\u5b57\u7b26\u5e8f\u5217\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u5206\u6bb5\u9519\u8bef\uff09\u6216\u53ef\u80fd\u5177\u6709\u672a\u6307\u660e\u7684\u5176\u4ed6\u5f71\u54cd\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Xterm\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Xterm Xterm"
  },
  "referenceLink": "https://access.redhat.com/errata/RHSA-2021:0611; http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27135",
  "serverity": "\u9ad8",
  "submitTime": "2021-03-04",
  "title": "Xterm\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2021-27135 (GCVE-0-2021-27135)

Vulnerability from cvelistv5 – Published: 2021-02-10 15:51 – Updated: 2024-08-03 20:40

Summary

xterm before Patch #366 allows remote attackers to execute arbitrary code or cause a denial of service (segmentation fault) via a crafted UTF-8 combining character sequence.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

13 references

URL	Tags
https://www.openwall.com/lists/oss-security/2021/…	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2021/…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/02/10/7	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://news.ycombinator.com/item?id=26524650	x_refsource_MISC
https://access.redhat.com/security/cve/CVE-2021-27135	x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=1927559	x_refsource_MISC
https://invisible-island.net/xterm/xterm.log.html	x_refsource_CONFIRM
https://github.com/ThomasDickey/xterm-snapshots/c…	x_refsource_CONFIRM
https://bugzilla.suse.com/show_bug.cgi?id=1182091	x_refsource_CONFIRM
http://seclists.org/fulldisclosure/2021/May/52	mailing-listx_refsource_FULLDISC
https://security.gentoo.org/glsa/202208-22	vendor-advisoryx_refsource_GENTOO

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.