CVE-2015-7540
First published: Fri Dec 04 2015(Updated: )
A denial-of-service vulnerability for the AD-DC due to insuffiecient checking on asn1 memory allocation was reported. Upstream bug: <a href="https://bugzilla.samba.org/show_bug.cgi?id=9187">https://bugzilla.samba.org/show_bug.cgi?id=9187</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/samba | <4.1.22 | 4.1.22 |
| redhat/samba | <4.2.0 | 4.2.0 |
| Samba | >=4.0.0<4.1.22 | |
| Ubuntu | =12.04 | |
| Ubuntu | =14.04 | |
| Ubuntu | =15.04 | |
| Ubuntu | =15.10 | |
| Debian | =7.0 | |
| Debian | =8.0 |
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Reference Links
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html
- http://www.debian.org/security/2016/dsa-3433
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://www.securityfocus.com/bid/79736
- http://www.securitytracker.com/id/1034492
- http://www.ubuntu.com/usn/USN-2855-1
- http://www.ubuntu.com/usn/USN-2855-2
- https://bugzilla.redhat.com/show_bug.cgi?id=1288451
- https://git.samba.org/?p=samba.git;a=commit;h=530d50a1abdcdf4d1775652d4c456c1274d83d8d
- https://git.samba.org/?p=samba.git;a=commit;h=9d989c9dd7a5b92d0c5d65287935471b83b6e884
- https://security.gentoo.org/glsa/201612-47
- https://www.samba.org/samba/security/CVE-2015-7540.html
- https://bugzilla.samba.org/show_bug.cgi?id=9187
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1292069
- https://git.samba.org/?p=samba.git;a=commitdiff;h=530d50a1abdcdf4d1775652d4c456c1274d83d8d
- https://git.samba.org/?p=samba.git;a=commitdiff;h=9d989c9dd7a5b92d0c5d65287935471b83b6e884
- https://rhn.redhat.com/errata/RHSA-2016-0010.html
- https://rhn.redhat.com/errata/RHSA-2016-0006.html
- https://rhn.redhat.com/errata/RHSA-2016-0015.html
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=9d989c9dd7a5b92d0c5d65287935471b83b6e884
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=530d50a1abdcdf4d1775652d4c456c1274d83d8d
Frequently Asked Questions
What is the severity of CVE-2015-7540?
CVE-2015-7540 has a severity rating of medium due to its potential for denial-of-service attacks.
How do I fix CVE-2015-7540?
To fix CVE-2015-7540, upgrade Samba to version 4.1.22 or 4.2.0 or later.
What systems are affected by CVE-2015-7540?
CVE-2015-7540 affects Samba versions prior to 4.1.22 and 4.2.0, and specific Ubuntu and Debian versions.
What kind of vulnerability is CVE-2015-7540?
CVE-2015-7540 is classified as a denial-of-service vulnerability related to insufficient ASN.1 memory allocation checks.
Is there a workaround for CVE-2015-7540?
There are no published workarounds for CVE-2015-7540; the recommended action is to apply the patch or upgrade.
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