Improper input validation in mosquitto (Alpine package)
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2017-7650 |
| CWE-ID | CWE-20 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
mosquitto (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) Improper input validation
EUVDB-ID: #VU6840
Risk: Low
CVSSv3.1: 3.5 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7650
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to improper handling of usernames, containing ‘#’ or ‘+’ characters, within pattern based ACLs. A remote attacker can create a specially crafted username and bypass implemented security mechanisms.
Install update from vendor's website.
Vulnerable software versionsmosquitto (Alpine package): 1.2.3-r0 - 1.4.11-r1
External linkshttp://git.alpinelinux.org/aports/commit/?id=c7054f04ca2564f83a1f8584c51980f47d479bfc
http://git.alpinelinux.org/aports/commit/?id=320ecd9d42687d45b7c82d0d14ac9e92a5b9b1e3
http://git.alpinelinux.org/aports/commit/?id=478ed45621953f401511c76d48e3196bb7ef7813
http://git.alpinelinux.org/aports/commit/?id=7b5929125122b280baf78cf8b7f2466dcf4d79d2
http://git.alpinelinux.org/aports/commit/?id=10d80c4a6dd266d82f42c9714fdef16c04b3a859
http://git.alpinelinux.org/aports/commit/?id=79170b170d09fe898c6c937ba588dc214dabb05c
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.
