fkie_cve-2021-47153
Vulnerability from fkie_nvd
Published
2024-03-25 09:15
Modified
2024-11-21 06:35
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
i2c: i801: Don't generate an interrupt on bus reset
Now that the i2c-i801 driver supports interrupts, setting the KILL bit
in a attempt to recover from a timed out transaction triggers an
interrupt. Unfortunately, the interrupt handler (i801_isr) is not
prepared for this situation and will try to process the interrupt as
if it was signaling the end of a successful transaction. In the case
of a block transaction, this can result in an out-of-range memory
access.
This condition was reproduced several times by syzbot:
https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e
https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e
https://syzkaller.appspot.com/bug?extid=c8ff0b6d6c73d81b610e
https://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb
https://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a
https://syzkaller.appspot.com/bug?extid=b4d3fd1dfd53e90afd79
So disable interrupts while trying to reset the bus. Interrupts will
be enabled again for the following transaction.
References
Impacted products
Vendor | Product | Version |
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{ cveTags: [], descriptions: [ { lang: "en", value: "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: i801: Don't generate an interrupt on bus reset\n\nNow that the i2c-i801 driver supports interrupts, setting the KILL bit\nin a attempt to recover from a timed out transaction triggers an\ninterrupt. Unfortunately, the interrupt handler (i801_isr) is not\nprepared for this situation and will try to process the interrupt as\nif it was signaling the end of a successful transaction. In the case\nof a block transaction, this can result in an out-of-range memory\naccess.\n\nThis condition was reproduced several times by syzbot:\nhttps://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e\nhttps://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e\nhttps://syzkaller.appspot.com/bug?extid=c8ff0b6d6c73d81b610e\nhttps://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb\nhttps://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a\nhttps://syzkaller.appspot.com/bug?extid=b4d3fd1dfd53e90afd79\n\nSo disable interrupts while trying to reset the bus. Interrupts will\nbe enabled again for the following transaction.", }, { lang: "es", value: "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: i2c: i801: no genera una interrupción al restablecer el bus Ahora que el controlador i2c-i801 admite interrupciones, configurar el bit KILL en un intento de recuperarse de una transacción con tiempo de espera agotado se activa una interrupción. Desafortunadamente, el controlador de interrupciones (i801_isr) no está preparado para esta situación e intentará procesar la interrupción como si estuviera indicando el final de una transacción exitosa. En el caso de una transacción en bloque, esto puede resultar en un acceso a la memoria fuera de rango. Esta condición fue reproducida varias veces por syzbot: https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e https://syzkaller.appspot.com/bug ?extid=c8ff0b6d6c73d81b610e https://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb https://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a https://syzkaller.appspot.com/bug?extid=b 4d3fd1dfd53e90afd79 Entonces deshabilite las interrupciones al intentar restablecer el bus. Las interrupciones se habilitarán nuevamente para la siguiente transacción.", }, ], id: "CVE-2021-47153", lastModified: "2024-11-21T06:35:30.260", metrics: { cvssMetricV31: [ { cvssData: { attackComplexity: "LOW", attackVector: "LOCAL", availabilityImpact: "HIGH", baseScore: 6, baseSeverity: "MEDIUM", confidentialityImpact: "HIGH", integrityImpact: "NONE", privilegesRequired: "HIGH", scope: "UNCHANGED", userInteraction: "NONE", vectorString: "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", version: "3.1", }, exploitabilityScore: 0.8, impactScore: 5.2, source: "134c704f-9b21-4f2e-91b3-4a467353bcc0", type: "Secondary", }, ], }, published: "2024-03-25T09:15:09.407", references: [ { source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67", url: "https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b", }, { source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67", url: "https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3", }, { source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67", url: "https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a", }, { source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67", url: "https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef", }, { source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67", url: "https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c", }, { source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67", url: "https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6", }, { source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67", url: "https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b", }, { source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67", url: "https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629", }, ], sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67", vulnStatus: "Awaiting Analysis", }
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Sightings
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Nomenclature
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