#VU54559 Double Free in Glibc - CVE-2021-27645
Published: July 6, 2021
Vulnerability identifier: #VU54559
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-27645
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Glibc
Glibc
Software vendor:
GNU
GNU
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error within the nameserver caching daemon (nscd) in the GNU C Library when processing a request for netgroup lookup. A local user can initiate a specially crafted request, trigger a double free error and perform a denial of service (DoS) attack.
Remediation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
External links
- https://sourceware.org/bugzilla/show_bug.cgi?id=27462
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/