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librenswan: IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload

🗓️ 27 Jul 2026 23:31:55Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 19 Views

Libreswan IKEv1 RSA-SHA1 flaw enables DoS via short hash and possible forgery on weak exponents.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9aarch64libreswan5.3.2-1.el9fdplibreswan-5.3.2-1.el9fdp.aarch64.rpm
Red Hat Enterprise Linux9ppc64lelibreswan5.3.2-1.el9fdplibreswan-5.3.2-1.el9fdp.ppc64le.rpm
Red Hat Enterprise Linux9s390xlibreswan5.3.2-1.el9fdplibreswan-5.3.2-1.el9fdp.s390x.rpm
Red Hat Enterprise Linux9x86_64libreswan5.3.2-1.el9fdplibreswan-5.3.2-1.el9fdp.x86_64.rpm
Red Hat Enterprise Linux9aarch64libreswan-debuginfo5.3.2-1.el9fdplibreswan-debuginfo-5.3.2-1.el9fdp.aarch64.rpm
Red Hat Enterprise Linux9ppc64lelibreswan-debuginfo5.3.2-1.el9fdplibreswan-debuginfo-5.3.2-1.el9fdp.ppc64le.rpm
Red Hat Enterprise Linux9s390xlibreswan-debuginfo5.3.2-1.el9fdplibreswan-debuginfo-5.3.2-1.el9fdp.s390x.rpm
Red Hat Enterprise Linux9x86_64libreswan-debuginfo5.3.2-1.el9fdplibreswan-debuginfo-5.3.2-1.el9fdp.x86_64.rpm
Red Hat Enterprise Linux9aarch64libreswan-debugsource5.3.2-1.el9fdplibreswan-debugsource-5.3.2-1.el9fdp.aarch64.rpm
Red Hat Enterprise Linux9ppc64lelibreswan-debugsource5.3.2-1.el9fdplibreswan-debugsource-5.3.2-1.el9fdp.ppc64le.rpm
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03 Sep 2026 14:15Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.9 - 8.1
EPSS0.00386
SSVC
19