Vulnerability Database

387,360

Total vulnerabilities in the database

CVE-2015-3281 — debian / debian_linux

Improper Restriction of Operations within the Bounds of a Memory Buffer

The buffer_slow_realign function in HAProxy 1.5.x before 1.5.14 and 1.6-dev does not properly realign a buffer that is used for pending outgoing data, which allows remote attackers to obtain sensitive information (uninitialized memory contents of previous requests) via a crafted request.

  • Published: Jul 6, 2015
  • Updated: Sep 18, 2026
  • CVE: CVE-2015-3281
  • Severity: Medium
  • Exploit:
  • CISA KEV:

CVSS v2:

  • Severity: Medium
  • Score: 5
  • AV:N/AC:L/Au:N/C:P/I:N/A:N

CWEs:

Software Affected versions
debian / debian_linux = 8.0
haproxy / haproxy = 1.5-dev
haproxy / haproxy = 1.5-dev0
haproxy / haproxy = 1.5-dev1
haproxy / haproxy = 1.5-dev10
haproxy / haproxy = 1.5-dev11
haproxy / haproxy = 1.5-dev12
haproxy / haproxy = 1.5-dev13
haproxy / haproxy = 1.5-dev14
haproxy / haproxy = 1.5-dev15
haproxy / haproxy = 1.5-dev16
haproxy / haproxy = 1.5-dev17
haproxy / haproxy = 1.5-dev18
haproxy / haproxy = 1.5-dev19
haproxy / haproxy = 1.5-dev2
haproxy / haproxy = 1.5-dev3
haproxy / haproxy = 1.5-dev4
haproxy / haproxy = 1.5-dev5
haproxy / haproxy = 1.5-dev6
haproxy / haproxy = 1.5-dev7
haproxy / haproxy = 1.5-dev8
haproxy / haproxy = 1.5-dev9
haproxy / haproxy = 1.5.0
haproxy / haproxy = 1.5.1
haproxy / haproxy = 1.5.2
haproxy / haproxy = 1.5.3
haproxy / haproxy = 1.5.4
haproxy / haproxy = 1.5.5
haproxy / haproxy = 1.5.6
haproxy / haproxy = 1.5.7
haproxy / haproxy = 1.5.8
haproxy / haproxy = 1.5.9
haproxy / haproxy = 1.5.10
haproxy / haproxy = 1.5.11
haproxy / haproxy = 1.5.12
haproxy / haproxy = 1.5.13
haproxy / haproxy = 1.6-dev0
canonical / ubuntu_linux = 14.10
canonical / ubuntu_linux = 15.04
opensuse / openstack_cloud = 5
opensuse / opensuse = 13.2
suse / linux_enterprise_high_availability_extension = 12
redhat / enterprise_linux_desktop = 7.0
redhat / enterprise_linux_server = 7.0
redhat / enterprise_linux_server_aus = 7.3
redhat / enterprise_linux_server_aus = 7.4
redhat / enterprise_linux_server_aus = 7.6
redhat / enterprise_linux_server_eus = 7.1
redhat / enterprise_linux_server_eus = 7.2
redhat / enterprise_linux_server_eus = 7.3
redhat / enterprise_linux_server_eus = 7.4
redhat / enterprise_linux_server_eus = 7.5
redhat / enterprise_linux_server_eus = 7.6
redhat / enterprise_linux_server_tus = 7.3
redhat / enterprise_linux_server_tus = 7.6
redhat / enterprise_linux_workstation = 7.0

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.