Buffer overflow in Systemd Project
CVE-2017-9445
In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that's too small. A malicious DNS server can exploit this via a response with a specially crafted TCP payload to trick systemd-resolved into allocating a buffer that's too small, and subsequently write arbitrary data beyond the end of it.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.548 (99.0th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.548 · newest: 0.548 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- launchpad.net/bugs/1695546 (Broken Link)
- www.securitytracker.com/id/1038806 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/99302 (VDB Entry, Third Party Advisory, vdb-entry)
- openwall.com/lists/oss-security/2017/06/27/8 (Patch, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-9445?
- CVE-2017-9445 is a high-severity vulnerability in Systemd Project, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2017-06-28.
- How severe is CVE-2017-9445?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2017-9445 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.