NULL pointer dereference in Libssh
CVE-2020-16135
libssh 0.9.4 has a NULL pointer dereference in tftpserver.c if ssh_buffer_new returns NULL.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.041 (90.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.041 · newest: 0.041 · change: 0.000
Affected products
- Libssh — versions 0.9.4
- Oracle Communications Cloud Native Core Policy — versions 1.15.0
- Canonical Ubuntu Linux — versions 16.04, 18.04, 20.04
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 32, 33
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.libssh.org/T232 (Issue Tracking, Vendor Advisory)
- bugs.libssh.org/rLIBSSHe631ebb3e2247dd25e9678e6827c20dc73b73238 (Exploit, Issue Tracking, Vendor Advisory)
- gitlab.com/libssh/libssh-mirror/-/merge_requests/120 (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/07/msg00034.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4447-1/ (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202011-05 (vendor-advisory, Third Party Advisory)
- www.oracle.com/security-alerts/cpuapr2022.html (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-16135?
- CVE-2020-16135 is a medium-severity vulnerability in Libssh, classified under NULL Pointer Dereference. CVSS score: 5.9/10. Published 2020-07-29.
- How severe is CVE-2020-16135?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2020-16135 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.