CVE-2020-1763

An out-of-bounds buffer read flaw was found in the pluto daemon of libreswan from versions 3.27 till 3.31 where, an unauthenticated attacker could use this flaw to crash libreswan by sending specially-crafted IKEv1 Informational Exchange packets. The daemon respawns after the crash.

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1813329	Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1763	Issue Tracking Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf	Third Party Advisory
https://github.com/libreswan/libreswan/commit/471a3e41a449d7c753bc4edbba4239501bb62ba8	Patch Third Party Advisory
https://libreswan.org/security/CVE-2020-1763/CVE-2020-1763.txt	Patch Vendor Advisory
https://security.gentoo.org/glsa/202007-21	Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04	Third Party Advisory US Government Resource
https://www.debian.org/security/2020/dsa-4684	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:libreswan:libreswan::::::::
	cpe:2.3:a:libreswan:libreswan:3.5:::::::*

History

No history.

Information

Published : 2020-05-12 14:15

Updated : 2023-11-07 03:19

NVD link : CVE-2020-1763

Mitre link : CVE-2020-1763

CVE.ORG link : CVE-2020-1763

JSON object : View

Products Affected

libreswan

libreswan

CWE

CWE-125

Out-of-bounds Read

{"id": "CVE-2020-1763", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "secalert@redhat.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2020-05-12T14:15:12.580", "references": [{"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1813329", "tags": ["Issue Tracking", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1763", "tags": ["Issue Tracking", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://github.com/libreswan/libreswan/commit/471a3e41a449d7c753bc4edbba4239501bb62ba8", "tags": ["Patch", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://libreswan.org/security/CVE-2020-1763/CVE-2020-1763.txt", "tags": ["Patch", "Vendor Advisory"], "source": "secalert@redhat.com"}, {"url": "https://security.gentoo.org/glsa/202007-21", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04", "tags": ["Third Party Advisory", "US Government Resource"], "source": "secalert@redhat.com"}, {"url": "https://www.debian.org/security/2020/dsa-4684", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-125"}]}, {"type": "Secondary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "An out-of-bounds buffer read flaw was found in the pluto daemon of libreswan from versions 3.27 till 3.31 where, an unauthenticated attacker could use this flaw to crash libreswan by sending specially-crafted IKEv1 Informational Exchange packets. The daemon respawns after the crash."}, {"lang": "es", "value": "Un fallo de lectura de b\u00fafer fuera de l\u00edmites fue detectado en el demonio pluto de libreswan versiones 3.27 hasta 3.31 donde, un atacante no autenticado podr\u00eda usar este fallo para bloquear a libreswan mediante el env\u00edo de paquetes IKEv1 Informational Exchange especialmente dise\u00f1ados. El demonio reaparece despu\u00e9s del bloqueo."}], "lastModified": "2023-11-07T03:19:34.507", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4D70ED5-291D-47AE-A6CB-0ED5AAB14329", "versionEndIncluding": "3.31", "versionStartIncluding": "3.27"}, {"criteria": "cpe:2.3:a:libreswan:libreswan:3.5:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9E018CD7-6E5B-421E-BF06-AEE4EE0CA4BD"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}