Out-of-bounds read in Xen - CVE-2017-7228
Published: July 28, 2020 / Updated: July 29, 2020
Vulnerability identifier: #VU31985
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2017-7228
CWE-ID: CWE-125
Exploitation vector: Adjecent network
Exploit availability:
Public exploit is available
Vendor: Xen Project
Affected software:
Xen
Xen
Detailed vulnerability description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
An issue (known as XSA-212) was discovered in Xen, with fixes available for 4.8.x, 4.7.x, 4.6.x, 4.5.x, and 4.4.x. The earlier XSA-29 fix introduced an insufficient check on XENMEM_exchange input, allowing the caller to drive hypervisor memory accesses outside of the guest provided input/output arrays.
How to mitigate CVE-2017-7228
Install updates from vendor's website.
Sources
- http://openwall.com/lists/oss-security/2017/04/04/3
- http://www.debian.org/security/2017/dsa-3847
- http://www.securityfocus.com/bid/97375
- http://www.securitytracker.com/id/1038223
- http://xenbits.xen.org/xsa/advisory-212.html
- https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-029-2017.txt
- https://googleprojectzero.blogspot.com/2017/04/pandavirtualization-exploiting-xen.html
- https://www.exploit-db.com/exploits/41870/