CVE-2005-4890: Input Validation
First published: Mon Jul 26 2004(Updated: )
Quoting first paragraph from [1]: <a class="bz_bug_link bz_status_CLOSED bz_closed bz_public " title="CLOSED RAWHIDE - Need to call setsid() when starting daemons to prevent TIOCSTI attacks" href="show_bug.cgi?id=173008">https://bugzilla.redhat.com/show_bug.cgi?id=173008</a> for issue description: ====================== When starting a program via "su - user -c program" the user session can escape to the parent session by using the TIOCSTI ioctl to push characters into the input buffer. This allows for example a non-root session to push "chmod 666 /etc/shadow" or similarly bad commands into the input buffer such that after the end of the session they are executed. References: [1] <a class="bz_bug_link bz_status_CLOSED bz_closed bz_public " title="CLOSED RAWHIDE - Need to call setsid() when starting daemons to prevent TIOCSTI attacks" href="show_bug.cgi?id=173008">https://bugzilla.redhat.com/show_bug.cgi?id=173008</a> [2] <a href="http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=628843">http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=628843</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/shadow | 1:4.8.1-1 1:4.13+dfsg1-1 1:4.15.3-2 1:4.16.0-4 | |
| debian/sudo | 1.9.5p2-3+deb11u1 1.9.13p3-1+deb12u1 1.9.15p5-3 | |
| Sudo | >=1.3.0<=1.7.4 | |
| Shadow-utils | >=4.0.0<=4.1.5 | |
| Debian | =8.0 | |
| Debian | =9.0 | |
| Debian | =10.0 | |
| Red Hat Enterprise Linux | =6.0 | |
| Red Hat Enterprise Linux | =4 | |
| Red Hat Enterprise Linux | =5 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2005-4890
- https://access.redhat.com/security/cve/cve-2005-4890
- http://www.openwall.com/lists/oss-security/2013/05/20/3
- http://www.openwall.com/lists/oss-security/2014/10/20/9
- http://www.openwall.com/lists/oss-security/2013/11/29/5
- http://www.openwall.com/lists/oss-security/2013/11/28/10
- http://www.openwall.com/lists/oss-security/2016/02/25/6
- http://www.openwall.com/lists/oss-security/2014/12/15/5
- http://www.openwall.com/lists/oss-security/2014/10/21/1
- https://security-tracker.debian.org/tracker/CVE-2005-4890
- http://www.openwall.com/lists/oss-security/2012/11/06/8
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=173008
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=628843
- http://www.openwall.com/lists/oss-security/2011/06/02/3
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=199066
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=280231
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=479145
- https://access.redhat.com/security/cve/CVE-2005-4890
- http://seclists.org/oss-sec/2011/q4/522
- https://access.redhat.com/support/policy/updates/errata/
- https://bugzilla.redhat.com/show_bug.cgi?id=710208
- https://www.cve.org/CVERecord?id=CVE-2005-4890 https://nvd.nist.gov/vuln/detail/CVE-2005-4890
- https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2005-4890.json
- https://bugzilla.redhat.com/show_bug.cgi?id=173008
Frequently Asked Questions
What is the severity of CVE-2005-4890?
CVE-2005-4890 has a moderate severity rating due to its potential exploitation in TIOCSTI attacks.
How do I fix CVE-2005-4890?
To fix CVE-2005-4890, update affected packages such as shadow and sudo to the specified remedied versions.
Which software versions are affected by CVE-2005-4890?
CVE-2005-4890 affects various versions of the Debian 'shadow' and 'sudo' packages, as well as certain versions of Red Hat Enterprise Linux.
What type of vulnerability is CVE-2005-4890?
CVE-2005-4890 is a privilege escalation vulnerability associated with improper handling of signals.
Is CVE-2005-4890 still a concern in modern systems?
While CVE-2005-4890 is older, systems running outdated versions of the affected software remain at risk and should be updated.
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