01 Record
CVE-2016-5361
programs/pluto/ikev1.c in libreswan before 3.17 retransmits in initial-responder states, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed UDP packet.
UnratedPUBLISHEDCNA: mitre
CNA base scoreUnratedNo CNA CVSS vector
02 Description
programs/pluto/ikev1.c in libreswan before 3.17 retransmits in initial-responder states, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed UDP packet.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.72% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 85.5% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2016-06-16 14:00Z10 YR AGO
- Last updated
- 2024-08-06 01:01Z2 YR AGO
- Reserved
- 2016-06-09
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-20Improper Input ValidationClass
- Data version
- 5.1
- Document digest
- 38eda1e759374812b3136cf6a875d06b7f5a0f743b0eb7dc003afd72bec5cf86
05 Affected products
06 References
- lists.libreswan.org[swan-dev] 20160313 Proposal: Do not retransmit IKEv1 reply for initial responder stateshttps://lists.libreswan.org/pipermail/swan-dev/2016-March/001394.html
- rhn.redhat.comRHSA-2016:2603http://rhn.redhat.com/errata/RHSA-2016-2603.html
- github.comhttps://github.com/libreswan/libreswan/commit/152d6d95632d8b9477c170f1de99bcd86d7fb1d6
- www.openwall.com[oss-security] 20160610 Re: CVE Request: IKEv1 protocol is vulnerable to DoS amplification attackhttp://www.openwall.com/lists/oss-security/2016/06/10/4