HIGH
libssh: null pointer dereference due to a logical error in the handling of a SSH_MSG_NEWKEYS and KEXDH_REPLY packets
Published Apr 13, 2016
7.5
HIGHCVSS 3.0
EPSS 3.91%
Description
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.
Affected products
No data.
Configuration 2
OR
- 12.04
- 14.04
- 15.10
Configuration 3
OR
- 7.0
- 8.0
Configuration 4
OR
- 21
- 22
No data.
Red Hat Enterprise Linux 7
libssh
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | libssh | Affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.91% 0.03910
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03910
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.91% (0.03910) | 89.96th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.91% (0.03910) | 88.90th | v5 (v2026.06.15) |
| Mar 17, 2025 | 2.39% (0.02391) | 83.92th | v4 (v2025.03.14) |
| Dec 12, 2024 | 6.68% (0.06680) | 94.09th | v3 (v2023.03.01) |
| Jul 15, 2023 | 6.68% (0.06680) | 92.86th | v3 (v2023.03.01) |
| Apr 26, 2023 | 5.96% (0.05960) | 92.33th | v3 (v2023.03.01) |
| Mar 7, 2023 | 5.12% (0.05124) | 91.69th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
Weaknesses (1)
References (11)
- http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161802.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158013.html vendor-advisoryx_refsource_FEDORA
- http://www.debian.org/security/2016/dsa-3488 vendor-advisoryx_refsource_DEBIAN
- http://www.ubuntu.com/usn/USN-2912-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2015-3146 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1213775 Issue Tracking
- https://git.libssh.org/projects/libssh.git/commit/?h=libssh-0.6.5&id=94f6955fbaee6fda9385a23e505497efe21f5b4f x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2015-3146
- https://www.cve.org/CVERecord?id=CVE-2015-3146
- https://www.libssh.org/2015/04/30/libssh-0-6-5-security-and-bugfix-release/ x_refsource_CONFIRMVendor Advisory
- https://www.libssh.org/security/advisories/CVE-2015-3146.txt x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161802.html | vendor-advisoryx_refsource_FEDORA | |
| http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158013.html | vendor-advisoryx_refsource_FEDORA | |
| http://www.debian.org/security/2016/dsa-3488 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.ubuntu.com/usn/USN-2912-1 | vendor-advisoryx_refsource_UBUNTU | |
| https://access.redhat.com/security/cve/CVE-2015-3146 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1213775 | Issue Tracking | |
| https://git.libssh.org/projects/libssh.git/commit/?h=libssh-0.6.5&id=94f6955fbaee6fda9385a23e505497efe21f5b4f | x_refsource_CONFIRM | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-3146 | ||
| https://www.cve.org/CVERecord?id=CVE-2015-3146 | ||
| https://www.libssh.org/2015/04/30/libssh-0-6-5-security-and-bugfix-release/ | x_refsource_CONFIRMVendor Advisory | |
| https://www.libssh.org/security/advisories/CVE-2015-3146.txt | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Apr 13, 2016
Updated Aug 6, 2024
Reserved Apr 10, 2015
Link CVE-2015-3146
CISA Vulnrichment
Updated n/a