Buffer overflow in Mcafee Web Gateway
CVE-2019-6454
An issue was discovered in sd-bus in systemd 239. bus_process_object() in libsystemd/sd-bus/bus-objects.c allocates a variable-length stack buffer for temporarily storing the object path of incoming D-Bus messages. An unprivileged local user can exploit this by sending a specially crafted message to PID1, causing the stack pointer to jump over the stack guard pages into an unmapped memory region and trigger a denial of service (systemd PID1 crash and kernel panic).
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.020 (81.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Mcafee Web Gateway
- NetApp Active Iq Performance Analytics Services
- Systemd Project — versions 239
- Canonical Ubuntu Linux — versions 16.04, 18.04, 18.10
- Debian Linux — versions 8.0, 9.0
- Fedoraproject Fedora — versions 29
- openSUSE Leap — versions 15.0
- Red Hat Enterprise Linux — versions 8.0
- Red Hat Enterprise Linux Compute Node Eus — versions 7.5
- Red Hat Enterprise Linux Desktop — versions 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.openwall.com/lists/oss-security/2019/02/18/3 (mailing-list, Patch, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/107081 (VDB Entry, Third Party Advisory, vdb-entry)
- usn.ubuntu.com/3891-1/ (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:0368 (vendor-advisory, Third Party Advisory)
- github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c (Patch, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2019/02/19/1 (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/02/msg00031.html (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2019/dsa-4393 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-6454?
- CVE-2019-6454 is a medium-severity vulnerability in Mcafee Web Gateway, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2019-03-21.
- How severe is CVE-2019-6454?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2019-6454 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.