#VU2752 Use-after-free in RPCBind - CVE-2015-7236

Vulnerability identifier: #VU2752

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2015-7236

CWE-ID: CWE-416

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
RPCBind
Universal components / Libraries / Libraries used by multiple products

Vendor: linux-nfs.org

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to use-after-free error in xprt_set_caller() function in rpcb_svc_com.c in rpcbind 0.2.1 and earlier. A remote attacker can cause a denial of service (daemon crash) via specially crafted packets that involve PMAP_CALLIT code.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install patch from vendor's website.

Vulnerable software versions

RPCBind: 0.1.4 - 0.2.1

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External links
https://www.spinics.net/lists/linux-nfs/msg53045.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.