What’s Vulnerable › Vulnerabilities

CVE-2015-3281

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2015-07-06 · updated 2026-06-17
• Weakness: CWE-119

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.

Affected products

• Canonical Ubuntu Linux: 14.10, 15.04
• Debian Linux: 8.0
• HAProxy: 1.5-dev, 1.5-dev0, 1.5-dev1, 1.5-dev10, 1.5-dev11, 1.5-dev12 (+30)
• openSUSE Openstack Cloud: 5
• Opensuse: 13.2
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Server Aus: 7.3, 7.4, 7.6
• RedHat Enterprise Linux Server Eus: 7.1, 7.2, 7.3, 7.4, 7.5, 7.6
• RedHat Enterprise Linux Server Tus: 7.3, 7.6
• RedHat Enterprise Linux Workstation: 7.0
• SUSE Linux Enterprise High Availability Extension: 12

References

• http://git.haproxy.org/?p=haproxy-1.5.git%3Ba=commit%3Bh=7ec765568883b2d4e5a2796adbeb492a22ec9bd4
• http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00023.html
• http://rhn.redhat.com/errata/RHSA-2015-1741.html
• http://rhn.redhat.com/errata/RHSA-2015-2666.html
• http://www.debian.org/security/2015/dsa-3301
• http://www.haproxy.org/news.html
• http://www.securityfocus.com/bid/75554
• http://www.ubuntu.com/usn/USN-2668-1
• http://git.haproxy.org/?p=haproxy-1.5.git%3Ba=commit%3Bh=7ec765568883b2d4e5a2796adbeb492a22ec9bd4
• http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00023.html

Get alerted when CVE-2015-3281 or the next vulnerability affects your stack