CVE-2015-3146: Null Pointer Dereference
First published: Wed Apr 13 2016(Updated: )
The (1) SSH_MSG_NEWKEYS and (2) SSH_MSG_KEXDH_REPLY packet handlers in package_cb.c in libssh before 0.6.5 do not properly validate state, which allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted SSH packet.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| libssh | <=0.6.4 | |
| Ubuntu | =12.04 | |
| Ubuntu | =14.04 | |
| Ubuntu | =15.10 | |
| Debian | =7.0 | |
| Debian | =8.0 | |
| Fedora | =21 | |
| Fedora | =22 |
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Reference Links
- http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161802.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158013.html
- http://www.debian.org/security/2016/dsa-3488
- http://www.ubuntu.com/usn/USN-2912-1
- https://git.libssh.org/projects/libssh.git/commit/?h=libssh-0.6.5&id=94f6955fbaee6fda9385a23e505497efe21f5b4f
- https://www.libssh.org/2015/04/30/libssh-0-6-5-security-and-bugfix-release/
- https://www.libssh.org/security/advisories/CVE-2015-3146.txt
Frequently Asked Questions
What is the severity of CVE-2015-3146?
CVE-2015-3146 is categorized as a denial of service vulnerability due to a NULL pointer dereference.
How do I fix CVE-2015-3146?
To fix CVE-2015-3146, update libssh to version 0.6.5 or later.
Which versions of libssh are affected by CVE-2015-3146?
Libssh versions prior to 0.6.5, including all versions up to and including 0.6.4, are affected.
What operating systems are impacted by CVE-2015-3146?
CVE-2015-3146 affects various Linux distributions including Ubuntu, Debian, and Fedora.
Can CVE-2015-3146 be exploited remotely?
Yes, CVE-2015-3146 can be exploited remotely by sending crafted SSH packets.
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/severity
- agent/last-modified-date
- agent/references
- agent/author
- agent/description
- agent/first-publish-date
- agent/event
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/libssh
- canonical/libssh
- version/libssh/0.6.4
- vendor/canonical
- canonical/ubuntu
- version/ubuntu/12.04
- version/ubuntu/14.04
- version/ubuntu/15.10
- vendor/debian
- canonical/debian
- version/debian/7.0
- version/debian/8.0
- vendor/fedoraproject
- canonical/fedora
- version/fedora/21
- version/fedora/22