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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.035 (89.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.035 · newest: 0.035 · change: 0.000
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 Linux — versions 9.0
- Fedoraproject Fedora — versions 35, 36
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgx (Exploit, Patch, Third Party Advisory)
- github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9 (Patch, Third Party Advisory)
- github.com/twisted/twisted/releases/tag/twisted-22.2.0 (Third Party Advisory, Release Notes)
- twistedmatrix.com/trac/ticket/10284 (Issue Tracking, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2022/03/msg00009.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpuapr2022.html (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202301-02 (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.