CVE-2022-21716

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 22.2.0, Twisted SSH client and server implement is able to accept an infinite amount of data for the peer's SSH version identifier. This ends up with a buffer using all the available memory. The attach is a simple as `nc -rv localhost 22 < /dev/zero`. A patch is available in version 22.2.0. There are currently no known workarounds.

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : 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://github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9	Patch Third Party Advisory
https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgx	Exploit Patch Third Party Advisory
https://twistedmatrix.com/trac/ticket/10284	Issue Tracking Vendor Advisory
https://github.com/twisted/twisted/releases/tag/twisted-22.2.0	Release Notes Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00009.html	Mailing List Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GLKHA6WREIVAMBQD7KKWYHPHGGNKMAG6/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7U6KYDTOLPICAVSR34G2WRYLFBD2YW5K/

Configurations

Configuration 1 (hide)

cpe:2.3:a:twistedmatrix:twisted:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Information

Published : 2022-03-03 21:15

Updated : 2022-07-03 03:15

NVD link : CVE-2022-21716

Mitre link : CVE-2022-21716

JSON object : View

Products Affected

debian

debian_linux

twistedmatrix

twisted

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9", "name": "https://github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9", "tags": ["Patch", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgx", "name": "https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgx", "tags": ["Exploit", "Patch", "Third Party Advisory"], "refsource": "CONFIRM"}, {"url": "https://twistedmatrix.com/trac/ticket/10284", "name": "https://twistedmatrix.com/trac/ticket/10284", "tags": ["Issue Tracking", "Vendor Advisory"], "refsource": "MISC"}, {"url": "https://github.com/twisted/twisted/releases/tag/twisted-22.2.0", "name": "https://github.com/twisted/twisted/releases/tag/twisted-22.2.0", "tags": ["Release Notes", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://lists.debian.org/debian-lts-announce/2022/03/msg00009.html", "name": "[debian-lts-announce] 20220308 [SECURITY] [DLA 2938-1] twisted security update", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://www.oracle.com/security-alerts/cpuapr2022.html", "name": "https://www.oracle.com/security-alerts/cpuapr2022.html", "tags": [], "refsource": "MISC"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GLKHA6WREIVAMBQD7KKWYHPHGGNKMAG6/", "name": "FEDORA-2022-71b66d4747", "tags": [], "refsource": "FEDORA"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7U6KYDTOLPICAVSR34G2WRYLFBD2YW5K/", "name": "FEDORA-2022-9a489fa494", "tags": [], "refsource": "FEDORA"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 22.2.0, Twisted SSH client and server implement is able to accept an infinite amount of data for the peer's SSH version identifier. This ends up with a buffer using all the available memory. The attach is a simple as `nc -rv localhost 22 < /dev/zero`. A patch is available in version 22.2.0. There are currently no known workarounds."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-120"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2022-21716", "ASSIGNER": "security-advisories@github.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"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"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 2.9, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"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}}, "publishedDate": "2022-03-03T21:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:twistedmatrix:twisted:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "22.2.0", "versionStartIncluding": "21.7.0"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-07-03T03:15Z"}