CVE-2020-10702
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.
Does this matter?
Lower severity and a low EPSS score (0.33%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.33% probability · 26th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-325
- Affected
- qemu/qemu
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10702Issue Tracking, Third Party Advisory
- https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=de0b1bae6461f67243282555475f88b2384a1eb9
- https://security.netapp.com/advisory/ntap-20200724-0007/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10702Issue Tracking, Third Party Advisory
- https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=de0b1bae6461f67243282555475f88b2384a1eb9
- https://security.netapp.com/advisory/ntap-20200724-0007/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.