1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200501-21 / HylaFAX |
| Release Date | January 11, 2005 |
| Latest Revision | January 11, 2005: 01 |
| Impact | normal |
| Exploitable | remote |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| net-misc/hylafax | < 4.2.0-r2 | >= 4.2.0-r2 | All supported architectures |
Related bugreports: #75941
HylaFAX is subject to a vulnerability in its username matching code, potentially allowing remote users to bypass access control lists.
HylaFAX is a software package for sending and receiving facsimile messages.
The code used by hfaxd to match a given username and hostname with an entry in the hosts.hfaxd file is insufficiently protected against malicious entries.
If the HylaFAX installation uses a weak hosts.hfaxd file, a remote attacker could authenticate using a malicious username or hostname and bypass the intended access restrictions.
As a workaround, administrators may consider adding passwords to all entries in the hosts.hfaxd file.
All HylaFAX users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/hylafax-4.2.0-r2" |
Note: Due to heightened security, weak entries in the hosts.hfaxd file may no longer work. Please see the HylaFAX documentation for details of accepted syntax in the hosts.hfaxd file.