CVE-2018-20533: Null Pointer Dereference
First published: Fri Dec 28 2018(Updated: )
A vulnerability was found in libsolv through 0.7.2. There is a NULL pointer dereference at ext/testcase.c (function testcase_str2dep_complex) in libsolvext.a in libsolv that will cause a denial of service. References: <a class="bz_bug_link bz_status_CLOSED bz_closed bz_public " title="CLOSED CURRENTRELEASE - CVE-2018-20533 libsolv: NULL pointer dereference in function testcase_str2dep_complex [rhel-8]" href="show_bug.cgi?id=1652599">https://bugzilla.redhat.com/show_bug.cgi?id=1652599</a> Upstream Patch: <a href="https://github.com/openSUSE/libsolv/pull/291">https://github.com/openSUSE/libsolv/pull/291</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Opensuse Libsolv | <=0.7.2 | |
| Canonical Ubuntu Linux | =18.10 | |
| debian/libsolv | 0.7.17-1+deb11u1 0.7.23-1+deb12u1 0.7.30-1 0.7.30-2 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00057.html
- https://access.redhat.com/errata/RHSA-2019:2290
- https://bugzilla.redhat.com/show_bug.cgi?id=1652599
- https://github.com/openSUSE/libsolv/pull/291
- https://usn.ubuntu.com/3916-1/
- https://launchpad.net/bugs/cve/CVE-2018-20533
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1652599
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1665537
- https://access.redhat.com/security/cve/cve-2018-20533
- https://bugzilla.redhat.com/show_bug.cgi?id=1665535
- https://github.com/openSUSE/libsolv/commit/4830af9d979d3685de538b80fbeba51ad590525e
- https://security-tracker.debian.org/tracker/CVE-2018-20533
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20533
- https://nvd.nist.gov/vuln/detail/CVE-2018-20533
- https://ubuntu.com/security/CVE-2018-20533
Frequently Asked Questions
What is CVE-2018-20533?
CVE-2018-20533 is a vulnerability that involves a NULL pointer dereference in libsolvext.a in libsolv through version 0.7.2, which can result in a denial of service.
How severe is CVE-2018-20533?
CVE-2018-20533 has a severity score of 6.5, which is classified as medium severity.
Which software is affected by CVE-2018-20533?
The software affected by CVE-2018-20533 includes libsolv versions 0.6.35-2+deb10u1, 0.7.3, and versions 0.7.17-1, 0.7.23-1, 0.7.25-1 from the Debian repository.
How can I fix CVE-2018-20533 in Debian?
To fix CVE-2018-20533 in Debian, update the libsolv package to version 0.6.35-2+deb10u1 or one of the recommended versions.
Where can I find more information about CVE-2018-20533?
More information about CVE-2018-20533 can be found at the following references: [http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00057.html](http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00057.html), [https://access.redhat.com/errata/RHSA-2019:2290](https://access.redhat.com/errata/RHSA-2019:2290), [https://bugzilla.redhat.com/show_bug.cgi?id=1652599](https://bugzilla.redhat.com/show_bug.cgi?id=1652599).
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