DEBIAN-CVE-2026-77207
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-77207
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77207.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-77207
- Upstream
- CVE-2026-77207
- Published
- 2026-10-13T22:18:26Z
- Modified
- 2026-10-14T10:00:37Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Libreswan has a null pointer dereference bug in the PKCS#7 handling code for IKE certificate authentication. When libreswan decodes an IKE CERT payload of type CERT_PKCS7_WRAPPED_X509, it guards the PKCS#7 blob with SEC_PKCS7ContainsCertsOrCrls() and then iterates the certificate list with SEC_PKCS7GetCertificateList(). The two NSS APIs disagree on a SignedData that carries a CRL but no certificates: ContainsCertsOrCrls() returns PR_TRUE (there is a CRL), so the guard passes, but GetCertificateList() returns NULL (there are no certificates). This causes libreswan to dereference a null pointer leading to a crash and restart. A malicious IKE_AUTH packet can trigger this bug, meaning the peer does not need to be authenticated. No remote code execution is possible. Continued exploitation can cause a denial of service.
- References
Affected packages
Debian:12 / libreswan
Package
- Name
- libreswan
- Purl
- pkg:deb/debian/libreswan?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / libreswan
Package
- Name
- libreswan
- Purl
- pkg:deb/debian/libreswan?arch=source&distro=trixie
Debian:14 / libreswan
Package
- Name
- libreswan
- Purl
- pkg:deb/debian/libreswan?arch=source&distro=forky