Improper Check for Unusual or Exceptional Conditions in OpenBGPD Portable - CVE-2023-38283
Published: September 13, 2023
Vulnerability identifier: #VU80764
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-38283
CWE-ID: CWE-754
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper error handling when processing BGP update data (length of path attributes). A remote attacker can send specially crafted BGP update data and cause the system to incorrectly reset a session.
Affected software
OpenBGPD Portable
How to mitigate CVE-2023-38283
Install updates from vendor's website.
OpenBGPD Portable - update to 8.1
External References
- https://news.ycombinator.com/item?id=37305800
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/006_bgpd.patch.sig
- https://www.openbsd.org/errata73.html
- https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handling
- https://github.com/openbgpd-portable/openbgpd-portable/releases/tag/8.1