Memory leak in dbus (Alpine package)



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-12049
CWE-ID CWE-401
Exploitation vector Local
Public exploit N/A
Vulnerable software
 dbus (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) Memory leak

EUVDB-ID: #VU29105

Risk: Low

CVSSv4.0: 1.1 [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-2020-12049

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due memory leak in libdbus when a message exceeds the per-message file descriptor limit. A local user with access to the D-Bus system bus or another system service's private AF_UNIX socket can make the system service reach its file descriptor limit, denying service to subsequent D-Bus clients.

Mitigation

Install update from vendor's website.

Vulnerable software versions

dbus (Alpine package): 1.4.0-r0 - 1.10.28-r0

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=ad543f975b5702508d7fd407a90fe969f6615166
https://git.alpinelinux.org/aports/commit/?id=2e63f747fe1e60480c416caab757d16e9c4765e7
https://git.alpinelinux.org/aports/commit/?id=b1f51586c78b6c75de117e134bef3777d3aad447
https://git.alpinelinux.org/aports/commit/?id=0c97df9e8787e643de194cf7e977a68467428793
https://git.alpinelinux.org/aports/commit/?id=9b4acf3c4bd6232498f253edb91cac9d933cede4


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.



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