Buffer overflow in Isc Bind
CVE-2023-3341
The code that processes control channel messages sent to `named` calls certain functions recursively during packet parsing. Recursion depth is only limited by the maximum accepted packet size; depending on the environment, this may cause the packet-parsing code to run out of available stack memory, causing `named` to terminate unexpectedly. Since each incoming control channel message is fully parsed before its contents are authenticated, exploiting this flaw does not require the attacker to hold a valid RNDC key; only network access to the control channel's configured TCP port is necessary. This issue affects BIND 9 versions 9.2.0 through 9.16.43, 9.18.0 through 9.18.18, 9.19.0 through 9.19.16, 9.9.3-S1 through 9.16.43-S1, and 9.18.0-S1 through 9.18.18-S1.
Vulnerability class: Buffer Overflow
EPSS: 0.026 (84.6th 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
- Isc Bind — versions 9.9.3, 9.9.12, 9.9.13
- Isc Bind 9 — versions 9.2.0, 9.18.0, 9.19.0
- Debian Debian_linux — versions 10.0, 11.0
- Fedoraproject Fedora — versions 37, 38
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-officer@isc.org (vendor-advisory, Vendor Advisory)
- security-officer@isc.org (Patch, Mailing List)
- security-officer@isc.org (Third Party Advisory)
- security-officer@isc.org (Mailing List)
- security-officer@isc.org (Mailing List)
- security-officer@isc.org (Third Party Advisory)
- security-officer@isc.org (Mailing List, Third Party Advisory)
- security-officer@isc.org (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-3341?
- CVE-2023-3341 is a high-severity vulnerability in Isc Bind, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2023-09-20.
- How severe is CVE-2023-3341?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-3341 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.