Link following in feh.finalrewind feh

1) Link following

EUVDB-ID: #VU45319

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-1031

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate or delete data.

The feh_unique_filename function in utils.c in feh 1.11.2 and earlier might allow local users to create arbitrary files via a symlink attack on a /tmp/feh_ temporary file, a different vulnerability than CVE-2011-0702.

Mitigation

Install update from vendor's website.

Vulnerable software versions

feh: 1.3.5 - 1.11.1

CPE2.3

• cpe:2.3:a:feh.finalrewind.org:feh:1.3.5:*:*:*:*:*:*:*
• cpe:2.3:a:feh.finalrewind.org:feh:1.4:*:*:*:*:*:*:*
• cpe:2.3:a:feh.finalrewind.org:feh:1.4.1:*:*:*:*:*:*:*

External links

https://secunia.com/advisories/43221
https://bugzilla.redhat.com/show_bug.cgi?id=676389
https://derf.homelinux.org/git/feh/commit/?id=23421a86cc826dd30f3dc4f62057fafb04b3ac40
https://derf.homelinux.org/git/feh/commit/?id=29ab0855f044ef2fe9c295b72abefcb37f0861a5
https://github.com/derf/feh/issues/#issue/32

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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