cnvd - cnvd-2025-15358

cnvd-2025-15358

Vulnerability from cnvd

Title: Gnu Screen竞争条件漏洞

Description:

Gnu Screen是由GNU项目开发的终端复用工具，允许用户在同一物理终端中创建多个虚拟终端会话，并支持会话恢复、窗口切换及多用户共享等功能。

Gnu Screen存在竞争条件漏洞，该漏洞源于TOCTOU竞争条件，攻击者可利用该漏洞向特权进程发送SIGHUP和SIGCONT信号。

Severity: 中

Patch Name: Gnu Screen竞争条件漏洞的补丁

Patch Description:

Gnu Screen是由GNU项目开发的终端复用工具，允许用户在同一物理终端中创建多个虚拟终端会话，并支持会话恢复、窗口切换及多用户共享等功能。

Gnu Screen存在竞争条件漏洞，该漏洞源于TOCTOU竞争条件，攻击者可利用该漏洞向特权进程发送SIGHUP和SIGCONT信号。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程序修复该安全问题，详情见厂商官网： https://ftp.gnu.org/gnu/screen/

Reference: https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-46805

Impacted products

Name
Gnu Screen <=5.0.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2025-46805",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2025-46805"
    }
  },
  "description": "Gnu Screen\u662f\u7531GNU\u9879\u76ee\u5f00\u53d1\u7684\u7ec8\u7aef\u590d\u7528\u5de5\u5177\uff0c\u5141\u8bb8\u7528\u6237\u5728\u540c\u4e00\u7269\u7406\u7ec8\u7aef\u4e2d\u521b\u5efa\u591a\u4e2a\u865a\u62df\u7ec8\u7aef\u4f1a\u8bdd\uff0c\u5e76\u652f\u6301\u4f1a\u8bdd\u6062\u590d\u3001\u7a97\u53e3\u5207\u6362\u53ca\u591a\u7528\u6237\u5171\u4eab\u7b49\u529f\u80fd\u3002\n\nGnu Screen\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eTOCTOU\u7ade\u4e89\u6761\u4ef6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5411\u7279\u6743\u8fdb\u7a0b\u53d1\u9001SIGHUP\u548cSIGCONT\u4fe1\u53f7\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u7a0b\u5e8f\u4fee\u590d\u8be5\u5b89\u5168\u95ee\u9898\uff0c\u8be6\u60c5\u89c1\u5382\u5546\u5b98\u7f51\uff1a\r\nhttps://ftp.gnu.org/gnu/screen/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2025-15358",
  "openTime": "2025-07-09",
  "patchDescription": "Gnu Screen\u662f\u7531GNU\u9879\u76ee\u5f00\u53d1\u7684\u7ec8\u7aef\u590d\u7528\u5de5\u5177\uff0c\u5141\u8bb8\u7528\u6237\u5728\u540c\u4e00\u7269\u7406\u7ec8\u7aef\u4e2d\u521b\u5efa\u591a\u4e2a\u865a\u62df\u7ec8\u7aef\u4f1a\u8bdd\uff0c\u5e76\u652f\u6301\u4f1a\u8bdd\u6062\u590d\u3001\u7a97\u53e3\u5207\u6362\u53ca\u591a\u7528\u6237\u5171\u4eab\u7b49\u529f\u80fd\u3002\r\n\r\nGnu Screen\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eTOCTOU\u7ade\u4e89\u6761\u4ef6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5411\u7279\u6743\u8fdb\u7a0b\u53d1\u9001SIGHUP\u548cSIGCONT\u4fe1\u53f7\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": "Gnu Screen\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Gnu Screen \u003c=5.0.0"
  },
  "referenceLink": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-46805",
  "serverity": "\u4e2d",
  "submitTime": "2025-05-30",
  "title": "Gnu Screen\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e"
}

CVE-2025-46805 (GCVE-0-2025-46805)

Vulnerability from cvelistv5

Published

2025-05-26 13:16

Modified

2025-05-27 14:10

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.7 (Medium) - CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CWE

CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Summary

Screen version 5.0.0 and older version 4 releases have a TOCTOU race potentially allowing to send SIGHUP, SIGCONT to privileged processes when installed setuid-root.

References

▼	URL	Tags
	https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-46805
	https://www.openwall.com/lists/oss-security/2025/05/12/1

Impacted products

	Vendor	Product	Version
			Version: 5.0. ≤ 5.0.0 Version: ? ≤ 4.9.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-46805",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-05-27T14:10:31.731680Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-05-27T14:10:49.034Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://git.savannah.gnu.org/cgit/screen.git",
          "defaultStatus": "unaffected",
          "packageName": "screen",
          "versions": [
            {
              "lessThanOrEqual": "5.0.0",
              "status": "affected",
              "version": "5.0.",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.1",
              "status": "affected",
              "version": "?",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Matthias Gerstner, SUSE"
        }
      ],
      "datePublic": "2025-05-12T15:24:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Screen version 5.0.0 and older version 4 releases have  a TOCTOU race potentially allowing to send SIGHUP, SIGCONT to privileged processes when installed setuid-root."
            }
          ],
          "value": "Screen version 5.0.0 and older version 4 releases have  a TOCTOU race potentially allowing to send SIGHUP, SIGCONT to privileged processes when installed setuid-root."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 5.7,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-367",
              "description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T13:23:17.702Z",
        "orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
        "shortName": "suse"
      },
      "references": [
        {
          "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-46805"
        },
        {
          "url": "https://www.openwall.com/lists/oss-security/2025/05/12/1"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Screen has a TOCTOU race potentially allowing to send SIGHUP, SIGCONT to privileged processes when installed setuid-root",
      "x_generator": {
        "engine": "Vulnogram 0.1.0-dev"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
    "assignerShortName": "suse",
    "cveId": "CVE-2025-46805",
    "datePublished": "2025-05-26T13:16:40.969Z",
    "dateReserved": "2025-04-30T11:28:04.728Z",
    "dateUpdated": "2025-05-27T14:10:49.034Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Action not permitted