CVE-2015-2688

View on CVE.org

Published Jan 24, 2020 CVSS 3.1 · 7.5 High EPSS 2.2% KEV · Not listed

Description

buf_pullup in Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 does not properly handle unexpected arrival times of buffers with invalid layouts, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

The Tor Project

Tor

affected

Version	Status	Constraints
`before 0.2.4.26`	affected	—
`0.2.5.x before 0.2.5.11`	affected	—

Configuration 1 [-]

OR	cpe:2.3:a:torproject:tor::::::::
	cpe:2.3:a:torproject:tor::::::::

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2015-2778	buf_pullup in Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 does not properly handle unexpected arrival times of buffers with invalid layouts, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: 2.2% (2.185% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html
https://trac.torproject.org/projects/tor/ticket/15083

History

No history.

Subscriptions

Torproject Tor

Weaknesses

CWE-755

Sources

CVE record Updated: Aug 6, 2024, 5:24 AM

Status: PUBLISHED
Assigner: debian
Published: Jan 24, 2020, 5:46 PM
Updated: Aug 6, 2024, 5:24 AM
Reserved: Mar 24, 2015, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 12:24 AM

Status: Modified
Published: Jan 24, 2020, 6:15 PM
Modified: Jun 17, 2026, 12:24 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

{"containers": {"cna": {"affected": [{"product": "Tor", "vendor": "The Tor Project", "versions": [{"status": "affected", "version": "before 0.2.4.26"}, {"status": "affected", "version": "0.2.5.x before 0.2.5.11"}]}], "datePublic": "2015-03-17T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "buf_pullup in Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 does not properly handle unexpected arrival times of buffers with invalid layouts, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets."}], "problemTypes": [{"descriptions": [{"description": "Other", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2020-01-24T17:46:21.000Z", "orgId": "79363d38-fa19-49d1-9214-5f28da3f3ac5", "shortName": "debian"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html"}, {"tags": ["x_refsource_MISC"], "url": "https://trac.torproject.org/projects/tor/ticket/15083"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@debian.org", "ID": "CVE-2015-2688", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Tor", "version": {"version_data": [{"version_value": "before 0.2.4.26"}, {"version_value": "0.2.5.x before 0.2.5.11"}]}}]}, "vendor_name": "The Tor Project"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "buf_pullup in Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 does not properly handle unexpected arrival times of buffers with invalid layouts, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Other"}]}]}, "references": {"reference_data": [{"name": "https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html", "refsource": "MISC", "url": "https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html"}, {"name": "https://trac.torproject.org/projects/tor/ticket/15083", "refsource": "MISC", "url": "https://trac.torproject.org/projects/tor/ticket/15083"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-06T05:24:38.426Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://trac.torproject.org/projects/tor/ticket/15083"}]}]}, "cveMetadata": {"assignerOrgId": "79363d38-fa19-49d1-9214-5f28da3f3ac5", "assignerShortName": "debian", "cveId": "CVE-2015-2688", "datePublished": "2020-01-24T17:46:21.000Z", "dateReserved": "2015-03-24T00:00:00.000Z", "dateUpdated": "2024-08-06T05:24:38.426Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "Tor", "vendor": "The Tor Project", "versions": [{"status": "affected", "version": "before 0.2.4.26"}, {"status": "affected", "version": "0.2.5.x before 0.2.5.11"}]}], "source": "security@debian.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*", "matchCriteriaId": "55010D56-46F9-4EA3-BD8B-8C29380DEC2F", "versionEndExcluding": "0.2.4.26", "vulnerable": true}, {"criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*", "matchCriteriaId": "969C5514-4DB6-4AF4-899C-3AF13C248B80", "versionEndExcluding": "0.2.5.11", "versionStartIncluding": "0.2.5.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "buf_pullup in Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 does not properly handle unexpected arrival times of buffers with invalid layouts, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets."}, {"lang": "es", "value": "La funci\u00f3n buf_pullup en Tor versiones anteriores a 0.2.4.26 y versiones 0.2.5.x anteriores a 0.2.5.11, no maneja apropiadamente los tiempos de llegada inesperados de b\u00faferes con dise\u00f1os no v\u00e1lidos, lo que permite a atacantes remotos causar una denegaci\u00f3n de servicio (falla de aserci\u00f3n y salida del demonio) por medio de paquetes dise\u00f1ados."}], "id": "CVE-2015-2688", "lastModified": "2026-06-17T00:24:33.600", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-01-24T18:15:12.240", "references": [{"source": "security@debian.org", "tags": ["Mailing List", "Vendor Advisory"], "url": "https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html"}, {"source": "security@debian.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://trac.torproject.org/projects/tor/ticket/15083"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Vendor Advisory"], "url": "https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://trac.torproject.org/projects/tor/ticket/15083"}], "sourceIdentifier": "security@debian.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-755"}], "source": "nvd@nist.gov", "type": "Primary"}]}