Link following in libvirt (Alpine package)
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2013-6456 |
| CWE-ID | CWE-59 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software |
libvirt (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) Link following
EUVDB-ID: #VU32531
Risk: Low
CVSSv4.0: 4.4 [CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2013-6456
CWE-ID:
CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Exploit availability: No
DescriptionThe vulnerability allows a remote #AU# to damange or delete data.
The LXC driver (lxc/lxc_driver.c) in libvirt 1.0.1 through 1.2.1 allows local users to (1) delete arbitrary host devices via the virDomainDeviceDettach API and a symlink attack on /dev in the container; (2) create arbitrary nodes (mknod) via the virDomainDeviceAttach API and a symlink attack on /dev in the container; and cause a denial of service (shutdown or reboot host OS) via the (3) virDomainShutdown or (4) virDomainReboot API and a symlink attack on /dev/initctl in the container, related to "paths under /proc/$PID/root" and the virInitctlSetRunLevel function.
MitigationInstall update from vendor's website.
Vulnerable software versionslibvirt (Alpine package): 1.0.5.9-r0
CPE2.3 External linkshttps://git.alpinelinux.org/aports/commit/?id=0cfa1ecb03e0d2edca62c8cd9b391a8dd3535f9e
https://git.alpinelinux.org/aports/commit/?id=d8714a39602de5077ab45918f69d5f43d26fd9c4
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
