HOME VULNERABILITIESCVE-2015-3281

MEDIUM

CVE-2015-3281

CWE-119Published: July 6, 2015· Updated: Jun 17, 2026

5.0

CVSS v3.1

Official Description

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.

Technical Analysis

CVE-2015-3281 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.

User Interaction

Scope

Impact

ConfidentialityP

IntegrityNone

AvailabilityNone

AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected Vendors & Products

Canonical1 product(s)

ubuntu linux

Debian1 product(s)

debian linux

haproxy1 product(s)

haproxy

openSUSE2 product(s)

openstack cloudopensuse

Red Hat6 product(s)

enterprise linux desktopenterprise linux serverenterprise linux server ausenterprise linux server eusenterprise linux server tusenterprise linux workstation

SUSE1 product(s)

linux enterprise high availability extension

Source: NVD CPE · 36 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.haproxy.org/news.html

PATCHhttp://www.haproxy.org/news.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2015-10/msg00001.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2015-10/msg00023.html

ADVISORYhttp://rhn.redhat.com/errata/RHSA-2015-1741.html

ADVISORYhttp://rhn.redhat.com/errata/RHSA-2015-2666.html

ADVISORYhttp://www.debian.org/security/2015/dsa-3301

ADVISORYhttp://www.securityfocus.com/bid/75554

ADVISORYhttp://www.ubuntu.com/usn/USN-2668-1

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2015-10/msg00001.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2015-10/msg00023.html

ADVISORYhttp://rhn.redhat.com/errata/RHSA-2015-1741.html

ADVISORYhttp://rhn.redhat.com/errata/RHSA-2015-2666.html

ADVISORYhttp://www.debian.org/security/2015/dsa-3301

ADVISORYhttp://www.securityfocus.com/bid/75554

ADVISORYhttp://www.ubuntu.com/usn/USN-2668-1

All References (18)

→

http://git.haproxy.org/?p=haproxy-1.5.git%3Ba=commit%3Bh=7ec765568883b2d4e5a2796adbeb492a22ec9bd4

→

http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00001.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00023.htmlMailing List · Third Party Advisory

→

http://rhn.redhat.com/errata/RHSA-2015-1741.htmlThird Party Advisory

→

http://rhn.redhat.com/errata/RHSA-2015-2666.htmlThird Party Advisory

→

http://www.debian.org/security/2015/dsa-3301Third Party Advisory

→

http://www.haproxy.org/news.htmlPatch · Vendor Advisory

→

http://www.securityfocus.com/bid/75554Third Party Advisory · VDB Entry

→

http://www.ubuntu.com/usn/USN-2668-1Third Party Advisory

→

http://git.haproxy.org/?p=haproxy-1.5.git%3Ba=commit%3Bh=7ec765568883b2d4e5a2796adbeb492a22ec9bd4

→

http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00001.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00023.htmlMailing List · Third Party Advisory

→

http://rhn.redhat.com/errata/RHSA-2015-1741.htmlThird Party Advisory

→

http://rhn.redhat.com/errata/RHSA-2015-2666.htmlThird Party Advisory

→

http://www.debian.org/security/2015/dsa-3301Third Party Advisory

Quick Facts

CVE IDCVE-2015-3281

CVSS Score5.0 / 10

SeverityMEDIUM

WeaknessCWE-119

CISA KEVNo

Affected6 vendor(s)

PublishedJul 6, 2015

Related CVEs (CWE-119)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2015-3281 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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