CVE-2023-2911

CWE-787 — Out-of-bounds WriteCWE-121 — Stack-based Buffer Overflow11 documents8 sources
Severity
7.5HIGH
EPSS
0.2%
top 59.13%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
ISC Bind 9ISC BindDebian Debian Linux+1 more
Timeline
PublishedJun 21
Latest updateJul 18

Description

If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow. This issue affects BIND 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages4 packages

▶Alpinebind< 9.16.42-r0
▶Debianbind9< 1:9.16.42-1~deb11u1+3
▶NVDisc/bind9.16.33 — 9.16.41+2
▶CVEListV5isc/bind_99.16.33 — 9.16.41+3

Also affects: Debian Linux 11.0, 12.0, Fedora 37, 38

Patches

Patch: www.openwall.com ↗Patch: www.openwall.com ↗

🔴Vulnerability Details

6
OSV
bind9 vulnerability↗2023-07-18
▶
OSV
CVE-2023-2911: If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`,↗2023-06-21
▶
GHSA
GHSA-rrr5-v5h9-fpwp: If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`,↗2023-06-21
▶
OSV
CVE-2023-2911: If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`,↗2023-06-21
▶
CVEList
Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale-answer-client-timeout is set to 0↗2023-06-21
▶

📋Vendor Advisories

4
Red Hat
bind: Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale-answer-client-timeout is set to 0↗2023-06-21
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Ubuntu
Bind vulnerabilities↗2023-06-21
▶
Microsoft
Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale-answer-client-timeout is set to 0↗2023-06-13
▶
Debian
CVE-2023-2911: bind9 - If the `recursive-clients` quota is reached on a BIND 9 resolver configured with...↗2023
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