Vulnerability in Libssh
CVE-2015-3146
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.039 (90.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000
Affected products
- Libssh
- Canonical Ubuntu Linux — versions 12.04, 14.04, 15.10
- Debian Linux — versions 7.0, 8.0
- Fedoraproject Fedora — versions 21, 22
Public proof-of-concept exploits
References
- www.ubuntu.com/usn/USN-2912-1 (vendor-advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-July/161802.html (vendor-advisory)
- www.libssh.org/security/advisories/CVE-2015-3146.txt (Vendor Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-May/158013.html (vendor-advisory)
- www.libssh.org/2015/04/30/libssh-0-6-5-security-and-bugfix-release/ (Vendor Advisory)
- www.debian.org/security/2016/dsa-3488 (vendor-advisory)
- git.libssh.org/projects/libssh.git/commit/
Frequently asked questions
- What is CVE-2015-3146?
- CVE-2015-3146 is a high-severity vulnerability in Libssh. CVSS score: 7.5/10. Published 2016-04-13.
- How severe is CVE-2015-3146?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2015-3146 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.