CVE-2015-3281

CVE-2015-3281 is a medium-severity vulnerability in Redhat Enterprise Linux Desktop with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.0)
• EPSS exploit prediction: 4% (90th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Redhat Enterprise Linux Desktop
• Published: 2015-07-06
• Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2015-3281?

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.

How severe is CVE-2015-3281?

CVE-2015-3281 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2015-3281 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3281?

CVE-2015-3281 primarily affects Redhat Enterprise Linux Desktop. In total, 56 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-3281?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-3281 published?

CVE-2015-3281 was published on 2015-07-06 and last updated on 2026-06-17.

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

Affected products (56)

• cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev0:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev1:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev10:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev11:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev12:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev13:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev14:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev15:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev16:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev17:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev18:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev19:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev2:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev3:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev4:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev5:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev6:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev7:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev8:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5:dev9:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.1:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.2:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.3:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.4:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.5:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.6:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.7:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.8:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.9:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.10:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.11:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.12:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.5.13:*:*:*:*:*:*:*
• cpe:2.3:a:haproxy:haproxy:1.6:dev0:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:openstack_cloud:5:*:*:*:*:*:*:*

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