CVE-2005-2359 — The AES-XCBC-MAC algorithm in IPsec in FreeBSD 5.3 and 5.4, when used for authentication without other encryption, uses a constant key instead of the one that was assigned by the system administrator, which can allow remote attackers to spoof packets to establish an IPsec session

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MEDIUM

The AES-XCBC-MAC algorithm in IPsec in FreeBSD 5.3 and 5.4, when used for authentication without other encryption, uses a constant key instead of the one that was assigned by the system administrator, which can allow remote attackers to spoof packets to establish an IPsec session

Published Aug 1, 2005

5.0

MEDIUM

CVSS 2.0

EPSS 0.91%

Description

The AES-XCBC-MAC algorithm in IPsec in FreeBSD 5.3 and 5.4, when used for authentication without other encryption, uses a constant key instead of the one that was assigned by the system administrator, which can allow remote attackers to spoof packets to establish an IPsec session.

Affected products

Remediation

No remediation recorded yet.

Metrics

0.91% 0.00906

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00906

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (11 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.91% (0.00906)	58.41th	v5 (v2026.06.15)
Jun 15, 2026	0.91% (0.00906)	55.02th	v5 (v2026.06.15)
Mar 17, 2025	0.36% (0.00364)	56.27th	v4 (v2025.03.14)
Dec 12, 2024	0.84% (0.00839)	82.78th	v3 (v2023.03.01)
Jul 8, 2024	0.84% (0.00839)	82.20th	v3 (v2023.03.01)
Apr 10, 2024	1.07% (0.01068)	83.96th	v3 (v2023.03.01)
Mar 7, 2023	1.07% (0.01068)	81.94th	v3 (v2023.03.01)
Mar 6, 2023	1.21% (0.01213)	66.61th	v2 (v2022.01.01)
Feb 17, 2023	1.21% (0.01213)	66.22th	v2 (v2022.01.01)
Apr 1, 2022	1.21% (0.01213)	64.21th	v2 (v2022.01.01)
Feb 4, 2022	1.21% (0.01213)	40.54th	v2 (v2022.01.01)

Weaknesses (0)

No CWE recorded.

References (5)

ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:19.ipsec.asc
vendor-advisoryx_refsource_FREEBSD
http://secunia.com/advisories/16244/
third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory
http://securitytracker.com/id?1014586
vdb-entryx_refsource_SECTRACK
http://www.securityfocus.com/bid/14394
vdb-entryx_refsource_BID
https://exchange.xforce.ibmcloud.com/vulnerabilities/21551
vdb-entryx_refsource_XF

Link	Providers	Tags
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:19.ipsec.asc		vendor-advisoryx_refsource_FREEBSD
http://secunia.com/advisories/16244/		third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory
http://securitytracker.com/id?1014586		vdb-entryx_refsource_SECTRACK
http://www.securityfocus.com/bid/14394		vdb-entryx_refsource_BID
https://exchange.xforce.ibmcloud.com/vulnerabilities/21551		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner freebsd

Published Aug 1, 2005

Updated Aug 7, 2024

Reserved Jul 26, 2005

Link CVE-2005-2359

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2005-2359

Red Hat

Severity n/a

Public date n/a

Links CVE-2005-2359