Medium severity · published Aug 2, 2021
CVE-2021-22552
An untrusted memory read vulnerability in Asylo versions up to 0.6.1 allows an untrusted attacker to pass a syscall number in MessageReader that is then used by sysno() and can…
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
An untrusted memory read vulnerability in Asylo versions up to 0.6.1 allows an untrusted attacker to pass a syscall number in MessageReader that is then used by sysno() and can bypass validation. This can allow the attacker to read memory from within the secure enclave. We recommend updating to Asylo 0.6.3 or past https://github.com/google/asylo/commit/90d7619e9dd99bcdb6cd28c7649d741d254d9a1a
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Asylo · Google
through 0.6.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22552
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22552
Exploit
https://github.com/google/asylo/commit/90d7619e9dd99bcdb6cd28c7649d741d254d9a1a
More from Asylo
9.6
CVE-2020-8904
An arbitrary memory overwrite vulnerability in the trusted memory of Asylo exists in versions prior to 0.6.0
7.8
CVE-2021-22550
An attacker can modify the pointers in enclave memory to overwrite arbitrary memory addresses within the secure enclave
7.8
CVE-2021-22549
An attacker can modify the address to point to trusted memory to overwrite arbitrary trusted memory
7.8
CVE-2021-22548
An attacker can change the pointer to untrusted memory to point to trusted memory region which causes copying trusted memory to trusted memory, if the latter is later copied out,…
7.8
CVE-2020-8935
An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allow an attacker to make an Ecall_restore function call to reallocate untrusted code and overwrite…