Integer Overflow or Wraparound Affecting qemu-img package, versions <15:3.1.0-3.el7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published10 Apr 2022
- disclosed19 Oct 2018
Introduced: 19 Oct 2018
CVE-2018-18438 (opens in a new tab)How to fix?
Upgrade Oracle:7 qemu-img to version 15:3.1.0-3.el7 or higher.
This issue was patched in ELSA-2019-4640.
NVD Description
Note: Versions mentioned in the description apply only to the upstream qemu-img package and not the qemu-img package as distributed by Oracle.
See How to fix? for Oracle:7 relevant fixed versions and status.
Qemu has integer overflows because IOReadHandler and its associated functions use a signed integer data type for a size value.
References
- https://linux.oracle.com/cve/CVE-2018-18438.html
- https://linux.oracle.com/errata/ELSA-2019-4640.html
- http://www.openwall.com/lists/oss-security/2018/10/17/3
- http://www.securityfocus.com/bid/105953
- https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02396.html
- https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02402.html