How severe is CVE-2015-8954?

CVE-2015-8954 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-8954 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-8954?

CVE-2015-8954 affects Openinfosecfoundation Suricata. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-8954?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2015-8954 published?

CVE-2015-8954 was published on 2017-03-20 and last updated on 2026-06-17.

CVE-2015-8954

CVE-2015-8954 is a critical-severity vulnerability in Openinfosecfoundation Suricata with a CVSS 3.x base score of 9.8. 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-264.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Openinfosecfoundation Suricata
Published: 2017-03-20
Last modified: 2026-06-17

Description

The MemcmpLowercase function in Suricata before 2.0.6 improperly excludes the first byte from comparisons, which might allow remote attackers to bypass intrusion-prevention functionality via a crafted HTTP request.

Frequently asked questions

What is CVE-2015-8954?: The MemcmpLowercase function in Suricata before 2.0.6 improperly excludes the first byte from comparisons, which might allow remote attackers to bypass intrusion-prevention functionality via a crafted HTTP request.
How severe is CVE-2015-8954?: CVE-2015-8954 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-8954 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-8954?: CVE-2015-8954 affects Openinfosecfoundation Suricata. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-8954?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-8954 published?: CVE-2015-8954 was published on 2017-03-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openinfosecfoundation:suricata:*:*:*:*:*:*:*:*

More vulnerabilities in Openinfosecfoundation Suricata

CVE-2017-15377 — High (CVSS 7.5): In Suricata before 4.x, it was possible to trigger lots of redundant checks on the content of crafted network traffic…
CVE-2017-7177 — High (CVSS 7.5): Suricata before 3.2.1 has an IPv4 defragmentation evasion issue caused by lack of a check for the IP protocol during…
CVE-2015-0971 — Medium (CVSS 5.0): The DER parser in Suricata before 2.0.8 allows remote attackers to cause a denial of service (crash) via vectors…
CVE-2014-6603 — Medium (CVSS 5.0): The SSHParseBanner function in SSH parser (app-layer-ssh.c) in Suricata before 2.0.4 allows remote attackers to bypass…
CVE-2013-5919 — Medium (CVSS 5.0): Suricata before 1.4.6 allows remote attackers to cause a denial of service (crash) via a malformed SSL record.

All CVEs affecting Openinfosecfoundation Suricata →

Other CWE-264 (Permissions, Privileges, and Access Controls) vulnerabilities

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CVE-2015-7919 — Critical (CVSS 10.0): SearchBlox 8.3 before 8.3.1 allows remote attackers to write to the config file, and consequently cause a denial of…
CVE-2015-7071 — Critical (CVSS 10.0): The File Bookmark component in Apple OS X before 10.11.2 allows attackers to bypass a sandbox protection mechanism for…

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