SB2026041563 - Two denial of service vulnerabilities in OpenBSD RPKI client

Description

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error (CVE-ID: N/A)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in RPKI client within the http_parse_header() function in /cvs/src/usr.sbin/rpki-client/http.c. A remote attacker with control over a malicious RPKI server can send specially crafted packets to the client and perform a denial of service attack.

2) NULL pointer dereference (CVE-ID: N/A)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in RPKI client within the x509_get_time() function in /cvs/src/usr.sbin/rpki-client/x509.c. A remote attacker with control over a malicious RRDP Publication Server can send specially crafted response to the client and perform a denial of service attack.

Remediation

Install update from vendor's website.

References

• http://www.openbsd.org/errata78.html#030
• http://www.openbsd.org/errata77.html#036
• https://ftp.openbsd.org/pub/OpenBSD/patches/7.8/common/030_rpki.patch.sig
• https://ftp.openbsd.org/pub/OpenBSD/patches/7.7/common/036_rpki.patch.sig