Buffer overflow in Gnu Grub2
CVE-2021-3697
A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an i…
Vulnerability class: Buffer Overflow
EPSS: 0.005 (36.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Gnu Grub2
- Redhat Codeready_linux_builder
- Redhat Developer_tools — versions 1.0
- Redhat Enterprise_linux — versions 8.0, 8.1, 8.4
- Redhat Enterprise_linux_eus — versions 8.2, 8.4, 8.6
- Redhat Enterprise_linux_for_power_little_endian — versions 8.0, 9.0
- Redhat Enterprise_linux_for_power_little_endian_eus — versions 8.2, 8.4, 8.6
- Redhat Enterprise_linux_server_aus — versions 8.2, 8.4, 8.6
- Redhat Enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions — versions 8.1, 8.2, 8.4
- Redhat Enterprise_linux_server_tus — versions 8.2, 8.4, 8.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3697?
- CVE-2021-3697 is a high-severity vulnerability in Gnu Grub2, classified under Out-of-bounds Write. CVSS score: 7.0/10. Published 2022-07-06.
- How severe is CVE-2021-3697?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2021-3697 known to be exploited?
- 19 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.