#VU33511 Use-after-free - CVE-2016-9401
Vulnerability identifier: #VU33511
Vulnerability risk: Low
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-416
Exploitation vector: Local
Exploit availability: No
Description
The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
popd in bash might allow local users to bypass the restricted shell and cause a use-after-free via a crafted address.
Mitigation
Install update from vendor's website.
External links
https://rhn.redhat.com/errata/RHSA-2017-0725.html
https://www.openwall.com/lists/oss-security/2016/11/17/5
https://www.openwall.com/lists/oss-security/2016/11/17/9
https://www.securityfocus.com/bid/94398
https://access.redhat.com/errata/RHSA-2017:1931
https://lists.debian.org/debian-lts-announce/2019/03/msg00028.html
https://security.gentoo.org/glsa/201701-02
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.
