CVE & CISA-KEV Catalog

CVE-2020-10702

MEDIUM

5.5

CVSS v3

Description

A flaw was found in QEMU in the implementation of the Pointer Authentication (PAuth) support for ARM introduced in version 4.0 and fixed in version 5.0.0. A general failure of the signature generation process caused every PAuth-enforced pointer to be signed with the same signature. A local attacker could obtain the signature of a protected pointer and abuse this flaw to bypass PAuth protection for all programs running on QEMU.

How to fix

Remediation Available

qemuDebian

Fixed in:1:4.2-5CVE-2020-10702

Fixed in:1:4.2-5CVE-2020-10702

Fixed in:1:4.2-5CVE-2020-10702

Fixed in:1:4.2-5CVE-2020-10702

qemuUbuntu

Fixed in:1:2.5+dfsg-5ubuntu10.44USN-4372-1

Fixed in:1:2.11+dfsg-1ubuntu7.26USN-4372-1

Fixed in:1:4.2-3ubuntu6.1USN-4372-1

qemu-systemUbuntu

Fixed in:1:2.5+dfsg-5ubuntu10.44USN-4372-1

Fixed in:1:2.11+dfsg-1ubuntu7.26USN-4372-1

Fixed in:1:4.2-3ubuntu6.1USN-4372-1

qemu-system-aarch64Ubuntu

Fixed in:1:2.5+dfsg-5ubuntu10.44USN-4372-1

qemu-system-armUbuntu

Fixed in:1:2.5+dfsg-5ubuntu10.44USN-4372-1

Fixed in:1:2.11+dfsg-1ubuntu7.26USN-4372-1

Fixed in:1:4.2-3ubuntu6.1USN-4372-1

qemu-system-mipsUbuntu

Fixed in:1:2.5+dfsg-5ubuntu10.44USN-4372-1

Fixed in:1:2.11+dfsg-1ubuntu7.26USN-4372-1

Fixed in:1:4.2-3ubuntu6.1USN-4372-1

qemu-system-ppcUbuntu

Fixed in:1:2.5+dfsg-5ubuntu10.44USN-4372-1

Fixed in:1:2.11+dfsg-1ubuntu7.26USN-4372-1

Fixed in:1:4.2-3ubuntu6.1USN-4372-1

qemu-system-s390xUbuntu

Fixed in:1:2.5+dfsg-5ubuntu10.44USN-4372-1

Fixed in:1:2.11+dfsg-1ubuntu7.26USN-4372-1

Fixed in:1:4.2-3ubuntu6.1USN-4372-1

qemu-system-sparcUbuntu

Fixed in:1:2.5+dfsg-5ubuntu10.44USN-4372-1

Fixed in:1:2.11+dfsg-1ubuntu7.26USN-4372-1

Fixed in:1:4.2-3ubuntu6.1USN-4372-1

qemu-system-x86Ubuntu

Fixed in:1:2.5+dfsg-5ubuntu10.44USN-4372-1

Fixed in:1:2.11+dfsg-1ubuntu7.26USN-4372-1

Fixed in:1:4.2-3ubuntu6.1USN-4372-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.33%probability of exploitation in 30 days

25thpercentile

Low risk: more likely to be exploited than 25% of all known CVEs.

References

Third-Party Advisory2

Other references1

git.qemu.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.