Skip to content
Fencer Intel
low 3.3

CVE-2011-1678 json

smbfs in Samba 3.5.8 and earlier attempts to use (1) mount.cifs to append to the /etc/mtab file and (2) umount.cifs to append to the /etc/m…

published 2011-04-10 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1678

cvss
3.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

smbfs in Samba 3.5.8 and earlier attempts to use (1) mount.cifs to append to the /etc/mtab file and (2) umount.cifs to append to the /etc/mtab.tmp file without first checking whether resource limits would interfere, which allows local users to trigger corruption of the /etc/mtab file via a process with a small RLIMIT_FSIZE value, a related issue to CVE-2011-1089.

Patch / fix

  • samba Debian 14, Debian 13, Debian 12 2:3.4.7~dfsg-2
  • cifs-utils Debian 14, Debian 13, Debian 12 2:5.1-1

debian advisories DEBIAN-CVE-2011-1678

  • samba RHEL 6 3.5.6-86.el6_1.4
  • cifs-utils RHEL 6 4.8.1-2.el6_1.2
  • samba-swat RHEL 6 3.5.6-86.el6_1.4
  • libsmbclient RHEL 6 3.5.6-86.el6_1.4
  • samba-client RHEL 6 3.5.6-86.el6_1.4
  • samba-common RHEL 6 3.5.6-86.el6_1.4
  • samba-winbind RHEL 6 3.5.6-86.el6_1.4
  • samba-domainjoin-gui RHEL 6 3.5.6-86.el6_1.4

red hat advisories RHSA-2011:1221RHSA-2011:1220RHSA-2011:1219

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-2011-1678 updated cvss 3.3

samba/cifs-utils: mount.cifs and umount.cifs fail to anticipate RLIMIT_FSIZE

  • Red Hat Enterprise Linux (v. 5 server) samba 3.0.33-3.29.el5_7.4, samba3x 3.5.4-0.83.el5_7.2, samba-swat 3.0.33-3.29.el5_7.4, samba3x-swat 3.5.4-0.83.el5_7.2, libsmbclient 3.0.33-3.29.el5_7.4, samba-client 3.0.33-3.29.el5_7.4, +5 more Red Hat Enterprise Linux AS version 4 samba 3.0.33-0.34.el4, samba-swat 3.0.33-0.34.el4, samba-client 3.0.33-0.34.el4, samba-common 3.0.33-0.34.el4 Red Hat Enterprise Linux Desktop (v. 5 client) samba 3.0.33-3.29.el5_7.4, samba3x 3.5.4-0.83.el5_7.2, samba-swat 3.0.33-3.29.el5_7.4, samba3x-swat 3.5.4-0.83.el5_7.2, libsmbclient 3.0.33-3.29.el5_7.4, samba-client 3.0.33-3.29.el5_7.4, +5 more Red Hat Enterprise Linux Desktop version 4 samba 3.0.33-0.34.el4, samba-swat 3.0.33-0.34.el4, samba-client 3.0.33-0.34.el4, samba-common 3.0.33-0.34.el4 Red Hat Enterprise Linux ES version 4 samba 3.0.33-0.34.el4, samba-swat 3.0.33-0.34.el4, samba-client 3.0.33-0.34.el4, samba-common 3.0.33-0.34.el4
    fixed: vendor fix RHSA-2011:1219
  • Red Hat Enterprise Linux Server (v. 6) samba 3.5.6-86.el6_1.4, cifs-utils 4.8.1-2.el6_1.2, libsmbclient 3.5.6-86.el6_1.4, samba-client 3.5.6-86.el6_1.4, samba-common 3.5.6-86.el6_1.4, samba-winbind 3.5.6-86.el6_1.4, +1 more Red Hat Enterprise Linux Server Optional (v. 6) samba 3.5.6-86.el6_1.4, samba-swat 3.5.6-86.el6_1.4, samba-domainjoin-gui 3.5.6-86.el6_1.4, samba-winbind-krb5-locator 3.5.6-86.el6_1.4
    fixed: vendor fix RHSA-2011:1221
  • Red Hat Enterprise Linux WS version 4 samba 3.0.33-0.34.el4, samba-swat 3.0.33-0.34.el4, samba-client 3.0.33-0.34.el4, samba-common 3.0.33-0.34.el4 Red Hat RHEL Desktop Workstation (v. 5 client) samba 3.0.33-3.29.el5_7.4, samba3x 3.5.4-0.83.el5_7.2
    fixed: vendor fix RHSA-2011:1219

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

0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 3.3 AV:L/AC:M/Au:N/C:P/I:P/A:N

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel 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.