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[ GLSA 200909-15 ] Lynx: Arbitrary command execution
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GLSA
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PostPosted: Sat Sep 12, 2009 8:26 pm    Post subject: [ GLSA 200909-15 ] Lynx: Arbitrary command execution Reply with quote

Gentoo Linux Security Advisory

Title: Lynx: Arbitrary command execution (GLSA 200909-15)
Severity: normal
Exploitable: remote
Date: September 12, 2009
Bug(s): #243058
ID: 200909-15

Synopsis


An incomplete fix for an issue related to the Lynx URL handler might allow
for the remote execution of arbitrary commands.


Background


Lynx is a fully-featured WWW client for users running
cursor-addressable, character-cell display devices such as vt100
terminals and terminal emulators.


Affected Packages

Package: www-client/lynx
Vulnerable: < 2.8.6-r4
Unaffected: >= 2.8.6-r4
Architectures: All supported architectures


Description


Clint Ruoho reported that the fix for CVE-2005-2929 (GLSA 200511-09)
only disabled the lynxcgi:// handler when not using the advanced mode.


Impact


A remote attacker can entice a user to access a malicious HTTP server,
causing Lynx to execute arbitrary commands. NOTE: The advanced mode is
not enabled by default. Successful exploitation requires the
"lynxcgi://" protocol to be registered with lynx on the victim's
system.


Workaround


There is no known workaround at this time.


Resolution


All Lynx users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=www-client/lynx-2.8.6-r4"


References

CVE-2005-2929
CVE-2008-4690
GLSA 200511-09


Last edited by GLSA on Mon Jun 10, 2013 4:30 am; edited 2 times in total
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