CVE-2018-14622: Null Pointer Dereference
First published: Wed Aug 22 2018(Updated: )
A flaw was found in libtirpc. The return value of makefd_xprt was used without checking for NULL in svc_vc.c, leading to a null pointer dereference / segfault if the maximum number of available file descriptors was exhausted. References: <a href="https://bugzilla.novell.com/show_bug.cgi?id=968175">https://bugzilla.novell.com/show_bug.cgi?id=968175</a> Upstream Patch: <a href="http://git.linux-nfs.org/?p=steved/libtirpc.git;a=commit;h=1c77f7a869bdea2a34799d774460d1f9983d45f0">http://git.linux-nfs.org/?p=steved/libtirpc.git;a=commit;h=1c77f7a869bdea2a34799d774460d1f9983d45f0</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libtirpc | <0.3.3 | 0.3.3 |
| debian/libtirpc | 1.3.1-1+deb11u1 1.3.3+ds-1 1.3.4+ds-1.3 | |
| libtirpc | <0.3.3 | |
| Ubuntu Linux | =14.04 | |
| Ubuntu Linux | =16.04 | |
| Ubuntu Linux | =18.04 | |
| Debian GNU/Linux | =8.0 | |
| Red Hat Enterprise Linux | =7.0 | |
| redhat enterprise Linux desktop | =7.0 | |
| redhat enterprise Linux server aus | =7.4 | |
| redhat enterprise Linux server eus | =7.4 | |
| redhat enterprise Linux server eus | =7.5 | |
| redhat enterprise Linux server eus | =7.6 | |
| redhat enterprise Linux workstation | =7.0 |
Remedy
http://git.linux-nfs.org/?p=steved/libtirpc.git;a=commit;h=1c77f7a869bdea2a34799d774460d1f9983d45f0
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Reference Links
- http://git.linux-nfs.org/?p=steved/libtirpc.git;a=commit;h=1c77f7a869bdea2a34799d774460d1f9983d45f0
- https://access.redhat.com/errata/RHBA-2017:1991
- https://bugzilla.novell.com/show_bug.cgi?id=968175
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14622
- https://lists.debian.org/debian-lts-announce/2018/08/msg00034.html
- https://usn.ubuntu.com/3759-1/
- https://usn.ubuntu.com/3759-2/
- https://launchpad.net/bugs/cve/CVE-2018-14622
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1620295
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1410617
- https://access.redhat.com/security/cve/CVE-2018-14622
- https://access.redhat.com/security/cve/CVE-2018-14621
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-9265
- https://bugzilla.suse.com/show_bug.cgi?id=968175
- https://bugzilla.novell.com/attachment.cgi?id=666865
- http://git.linux-nfs.org/?p=steved/libtirpc.git;a=commit;h=fce98161d9815ea016855d9f00274276452c2c4b
- https://bugzilla.redhat.com/show_bug.cgi?id=1620293
- http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=1c77f7a869bdea2a34799d774460d1f9983d45f0
- https://security-tracker.debian.org/tracker/CVE-2018-14622
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14622
- https://nvd.nist.gov/vuln/detail/CVE-2018-14622
- https://ubuntu.com/security/CVE-2018-14622
Frequently Asked Questions
What is the severity of CVE-2018-14622?
CVE-2018-14622 has a moderate severity level due to its potential to cause a null pointer dereference leading to application crashes.
How do I fix CVE-2018-14622?
To fix CVE-2018-14622, update the libtirpc package to version 0.3.4 or later for Red Hat systems and to 1.3.1-1+deb11u1 or later for Debian systems.
Which software is affected by CVE-2018-14622?
CVE-2018-14622 affects the libtirpc package across various versions of Red Hat, Debian, and Ubuntu operating systems.
Is CVE-2018-14622 exploitable on all systems?
CVE-2018-14622 is exploitable on systems where the maximum number of available file descriptors is exhausted, leading to a null pointer dereference.
What is the impact of CVE-2018-14622?
The impact of CVE-2018-14622 includes potential application crashes due to segmentation faults resulting from null pointer dereferences.
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