Use-after-free in samba (Alpine package)



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-10760
CWE-ID CWE-416
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 samba (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU29485

Risk: Medium

CVSSv4.0: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:P/U:Green]

CVE-ID: CVE-2020-10760

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error  in Samba AD DC Global Catalog with paged_results and VLV. A remote user can send a specially crafted request to the LDAP server, trigger a use-after-free error and perform a denial of service attack.


Mitigation

Install update from vendor's website.

Vulnerable software versions

samba (Alpine package): 4.5.4-r0 - 4.12.2-r2

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=b430c8e9b07545e7ad2ecf2a3776a51ce0c28b45


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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