Fedora, Ubuntu, and Debian are the systems most at risk from the bug. It's found in the GNU C Library (glibc) in the GNU system, which is found in most systems running the Linux kernel.
More information is available in our blog post here.
- Description
- A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges.
- Source
- secalert@redhat.com
- NVD status
- Analyzed
CVSS 3.1
- Type
- Primary
- Base score
- 7.8
- Impact score
- 5.9
- Exploitability score
- 1.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity
- HIGH
Data from CISA
- Vulnerability name
- GNU C Library Buffer Overflow Vulnerability
- Exploit added on
- Nov 21, 2023
- Exploit action due
- Dec 12, 2023
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Hype score
- Not currently trending
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