Out-of-Bounds Affecting grub2 package, versions <2.02~beta2-8
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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Test your applications- Snyk IDSNYK-DEBIAN11-GRUB2-528283
- published19 Jun 2017
- disclosed19 Jun 2017
Introduced: 19 Jun 2017
CVE-2017-9763 (opens in a new tab)How to fix?
Upgrade Debian:11 grub2 to version 2.02~beta2-8 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream grub2 package and not the grub2 package as distributed by Debian.
See How to fix? for Debian:11 relevant fixed versions and status.
The grub_ext2_read_block function in fs/ext2.c in GNU GRUB before 2013-11-12, as used in shlr/grub/fs/ext2.c in radare2 1.5.0, allows remote attackers to cause a denial of service (excessive stack use and application crash) via a crafted binary file, related to use of a variable-size stack array.
References
- https://security-tracker.debian.org/tracker/CVE-2017-9763
- https://github.com/radare/radare2/commit/65000a7fd9eea62359e6d6714f17b94a99a82edd
- https://github.com/radare/radare2/issues/7723
- http://git.savannah.gnu.org/cgit/grub.git/commit/grub-core/fs/ext2.c?id=ac8cac1dac50daaf1c390d701cca3b55e16ee768
- http://www.securityfocus.com/bid/99141
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-9763