Vulnerability in Oracle Linux
CVE-2016-4556
Double free vulnerability in Esi.cc in Squid 3.x before 3.5.18 and 4.x before 4.0.10 allows remote servers to cause a denial of service (crash) via a crafted Edge Side Includes (ESI) response.
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: 0.231 (97.7th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.231 · newest: 0.231 · change: 0.000
Affected products
- Oracle Linux — versions 6, 7
- Squid-Cache Squid — versions 3.0, 3.1, 3.1.0.1
- Canonical Ubuntu Linux — versions 12.04, 14.04, 15.10
Public proof-of-concept exploits
References
- security.gentoo.org/glsa/201607-01 (vendor-advisory)
- www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_9.patch (Patch)
- www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html (Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html (vendor-advisory)
- www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_9.patch
- www.ubuntu.com/usn/USN-2995-1 (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2016/05/06/5 (mailing-list, Third Party Advisory, Release Notes)
- access.redhat.com/errata/RHSA-2016:1140 (vendor-advisory)
- lists.opensuse.org/opensuse-updates/2016-08/msg00069.html (vendor-advisory)
- www.securitytracker.com/id/1035770 (Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2016-4556?
- CVE-2016-4556 is a high-severity vulnerability in Oracle Linux. CVSS score: 7.5/10. Published 2016-05-10.
- How severe is CVE-2016-4556?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-4556 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.