Link following in sudo (Alpine package)
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-23239 |
| CWE-ID | CWE-59 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
sudo (Alpine package) Operating systems & Components / Operating system package or component |
| Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Link following
EUVDB-ID: #VU49883
Risk: Low
CVSSv3.1: 2.2 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-23239
CWE-ID:
CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Exploit availability: No
DescriptionThe vulnerability allows a local authenticated user to gain access to sensitive information.
The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path.
MitigationInstall update from vendor's website.
Vulnerable software versionssudo (Alpine package): 1.9.0-r0 - 1.9.4p2-r0
External linkshttp://git.alpinelinux.org/aports/commit/?id=6f862af12a9c4d74d149a51984d234557cdb365b
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
