CVE-2023-6129
Vulnerability from cvelistv5
Published
2024-01-09 16:36
Modified
2024-10-14 14:55
Severity ?
Summary
POLY1305 MAC implementation corrupts vector registers on PowerPC
References
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/050d26383d4e264966fb83428e72d5d48f402d35Patch
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/5b139f95c9a47a55a0c54100f3837b1eee942b04Patch
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/f3fc5808fe9ff74042d639839610d03b8fdcc015Patch
openssl-security@openssl.orghttps://www.openssl.org/news/secadv/20240109.txtVendor Advisory
Impacted products
OpenSSLOpenSSL
Show details on NVD website

To clipboard 

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              "value": "Issue summary: The POLY1305 MAC (message authentication code) implementation\u003cbr\u003econtains a bug that might corrupt the internal state of applications running\u003cbr\u003eon PowerPC CPU based platforms if the CPU provides vector instructions.\u003cbr\u003e\u003cbr\u003eImpact summary: If an attacker can influence whether the POLY1305 MAC\u003cbr\u003ealgorithm is used, the application state might be corrupted with various\u003cbr\u003eapplication dependent consequences.\u003cbr\u003e\u003cbr\u003eThe POLY1305 MAC (message authentication code) implementation in OpenSSL for\u003cbr\u003ePowerPC CPUs restores the contents of vector registers in a different order\u003cbr\u003ethan they are saved. Thus the contents of some of these vector registers\u003cbr\u003eare corrupted when returning to the caller. The vulnerable code is used only\u003cbr\u003eon newer PowerPC processors supporting the PowerISA 2.07 instructions.\u003cbr\u003e\u003cbr\u003eThe consequences of this kind of internal application state corruption can\u003cbr\u003ebe various - from no consequences, if the calling application does not\u003cbr\u003edepend on the contents of non-volatile XMM registers at all, to the worst\u003cbr\u003econsequences, where the attacker could get complete control of the application\u003cbr\u003eprocess. However unless the compiler uses the vector registers for storing\u003cbr\u003epointers, the most likely consequence, if any, would be an incorrect result\u003cbr\u003eof some application dependent calculations or a crash leading to a denial of\u003cbr\u003eservice.\u003cbr\u003e\u003cbr\u003eThe POLY1305 MAC algorithm is most frequently used as part of the\u003cbr\u003eCHACHA20-POLY1305 AEAD (authenticated encryption with associated data)\u003cbr\u003ealgorithm. The most common usage of this AEAD cipher is with TLS protocol\u003cbr\u003eversions 1.2 and 1.3. If this cipher is enabled on the server a malicious\u003cbr\u003eclient can influence whether this AEAD cipher is used. This implies that\u003cbr\u003eTLS server applications using OpenSSL can be potentially impacted. However\u003cbr\u003ewe are currently not aware of any concrete application that would be affected\u003cbr\u003eby this issue therefore we consider this a Low severity security issue."
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The vulnerable code is used only\\non newer PowerPC processors supporting the PowerISA 2.07 instructions.\\n\\nThe consequences of this kind of internal application state corruption can\\nbe various - from no consequences, if the calling application does not\\ndepend on the contents of non-volatile XMM registers at all, to the worst\\nconsequences, where the attacker could get complete control of the application\\nprocess. However unless the compiler uses the vector registers for storing\\npointers, the most likely consequence, if any, would be an incorrect result\\nof some application dependent calculations or a crash leading to a denial of\\nservice.\\n\\nThe POLY1305 MAC algorithm is most frequently used as part of the\\nCHACHA20-POLY1305 AEAD (authenticated encryption with associated data)\\nalgorithm. The most common usage of this AEAD cipher is with TLS protocol\\nversions 1.2 and 1.3. If this cipher is enabled on the server a malicious\\nclient can influence whether this AEAD cipher is used. This implies that\\nTLS server applications using OpenSSL can be potentially impacted. However\\nwe are currently not aware of any concrete application that would be affected\\nby this issue therefore we consider this a Low severity security issue.\"},{\"lang\":\"es\",\"value\":\"Resumen del problema: la implementaci\u00f3n POLY1305 MAC (c\u00f3digo de autenticaci\u00f3n de mensajes) contiene un error que podr\u00eda da\u00f1ar el estado interno de las aplicaciones que se ejecutan en plataformas basadas en CPU PowerPC si la CPU proporciona instrucciones vectoriales. Resumen del impacto: si un atacante puede influir en el uso del algoritmo MAC POLY1305, el estado de la aplicaci\u00f3n podr\u00eda corromperse con varias consecuencias dependientes de la aplicaci\u00f3n. La implementaci\u00f3n POLY1305 MAC (c\u00f3digo de autenticaci\u00f3n de mensajes) en OpenSSL para CPU PowerPC restaura el contenido de los registros vectoriales en un orden diferente al que se guardan. Por lo tanto, el contenido de algunos de estos registros vectoriales se corrompe cuando regresa al llamante. El c\u00f3digo vulnerable se utiliza s\u00f3lo en procesadores PowerPC m\u00e1s nuevos que admiten las instrucciones PowerISA 2.07. Las consecuencias de este tipo de corrupci\u00f3n del estado de la aplicaci\u00f3n interna pueden ser diversas: desde ninguna consecuencia, si la aplicaci\u00f3n que llama no depende en absoluto del contenido de los registros XMM no vol\u00e1tiles, hasta las peores consecuencias, donde el atacante podr\u00eda obtener el control total de el proceso de solicitud. Sin embargo, a menos que el compilador utilice registros vectoriales para almacenar punteros, la consecuencia m\u00e1s probable, si la hubiera, ser\u00eda un resultado incorrecto de algunos c\u00e1lculos dependientes de la aplicaci\u00f3n o una falla que provocar\u00eda una denegaci\u00f3n de servicio. El algoritmo POLY1305 MAC se utiliza con mayor frecuencia como parte del algoritmo CHACHA20-POLY1305 AEAD (cifrado autenticado con datos asociados). El uso m\u00e1s com\u00fan de este cifrado AEAD es con las versiones 1.2 y 1.3 del protocolo TLS. Si este cifrado est\u00e1 habilitado en el servidor, un cliente malicioso puede influir en si se utiliza este cifrado AEAD. Esto implica que las aplicaciones del servidor TLS que utilizan OpenSSL pueden verse potencialmente afectadas. Sin embargo, actualmente no conocemos ninguna aplicaci\u00f3n concreta que pueda verse afectada por este problema, por lo que lo consideramos un problema de seguridad de gravedad baja.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"HIGH\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":2.2,\"impactScore\":4.2}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]},{\"source\":\"openssl-security@openssl.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-440\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.0.0\",\"versionEndIncluding\":\"3.0.12\",\"matchCriteriaId\":\"E74FD809-31DE-4F31-82D6-6D71DF453A03\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.1.0\",\"versionEndIncluding\":\"3.1.4\",\"matchCriteriaId\":\"28DDD110-1559-46F9-A62B-1B4648F83933\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openssl:openssl:3.2.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"92B2CAA8-D3C8-4789-8B6A-D6FC6C294842\"}]}]}],\"references\":[{\"url\":\"https://github.com/openssl/openssl/commit/050d26383d4e264966fb83428e72d5d48f402d35\",\"source\":\"openssl-security@openssl.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/openssl/openssl/commit/5b139f95c9a47a55a0c54100f3837b1eee942b04\",\"source\":\"openssl-security@openssl.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/openssl/openssl/commit/f3fc5808fe9ff74042d639839610d03b8fdcc015\",\"source\":\"openssl-security@openssl.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://www.openssl.org/news/secadv/20240109.txt\",\"source\":\"openssl-security@openssl.org\",\"tags\":[\"Vendor Advisory\"]}]}}"
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