CVE Vulnerabilities

CVE-2017-12133

Use After Free

Published: Sep 07, 2017 | Modified: Apr 20, 2025
CVSS 3.x
5.9
MEDIUM
Source:
NVD
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N
RedHat/V2
RedHat/V3
3.7 LOW
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Ubuntu
LOW

Use-after-free vulnerability in the clntudp_call function in sunrpc/clnt_udp.c in the GNU C Library (aka glibc or libc6) before 2.26 allows remote attackers to have unspecified impact via vectors related to error path.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name Vendor Start Version End Version
Glibc Gnu * 2.25 (including)
Eglibc Ubuntu esm-infra-legacy/trusty *
Eglibc Ubuntu precise/esm *
Eglibc Ubuntu trusty *
Eglibc Ubuntu trusty/esm *
Glibc Ubuntu esm-infra/xenial *
Glibc Ubuntu vivid/ubuntu-core *
Glibc Ubuntu xenial *
Glibc Ubuntu zesty *

Potential Mitigations

References