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Fencer Vulns
medium 6.9

CVE-2008-4956 json

fwb_install in fwbuilder 2.1.19 allows local users to overwrite arbitrary files via a symlink attack on a /tmp/ssh-agent.##### temporary fi…

published 2008-11-05 18 y ago modified 2026-06-16 4 mo ago also EUVD-2008-4935

cvss
6.9
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

fwb_install in fwbuilder 2.1.19 allows local users to overwrite arbitrary files via a symlink attack on a /tmp/ssh-agent.##### temporary file.

Patch / fix

  • fwbuilder Debian 14, Debian 13, Debian 12 2.1.19-5

debian advisories DEBIAN-CVE-2008-4956

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2008-4956 updated

fwbuilder: temporary file vulnerability

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • dev.gentoo.org http://dev.gentoo.org/~rbu/security/debiantemp/fwbuilder referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 6.9 AV:L/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.