Buffer overflow in Oracle HTTP Server
CVE-2022-21716
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 22.2.0, Twisted SSH client and server implement is able to accept an infinite amount of data for the peer's SSH version identifier. This ends up with a buffer using all the available memory. The attach is a simple as `nc -rv localhost 22 < /dev/zero`. A patch is available in version 22.2.0. There are currently no known workarounds.
Vulnerability class: Buffer Overflow
EPSS: 0.035 (88.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Oracle Http_server — versions 12.2.1.3.0, 12.2.1.4.0
- Oracle Zfs_storage_appliance_kit — versions 8.8
- Twisted — versions < 22.2.0
- Debian Debian_linux — versions 9.0
- Fedoraproject Fedora — versions 35, 36
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (Exploit, Patch, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory)
- security-advisories@github.com (Third Party Advisory, Release Notes)
- security-advisories@github.com (Issue Tracking, Vendor Advisory)
- security-advisories@github.com (mailing-list, Mailing List, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory)
- security-advisories@github.com (vendor-advisory)
- security-advisories@github.com (vendor-advisory)
- security-advisories@github.com (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-21716?
- CVE-2022-21716 is a high-severity vulnerability in Oracle HTTP Server, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2022-03-03.
- How severe is CVE-2022-21716?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-21716 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.