cbcvebase.
CVE-2014-0591
published 2014-01-14

CVE-2014-0591: The query_findclosestnsec3 function in query.c in named in ISC BIND 9.6, 9.7, and 9.8 before 9.8.6-P2 and 9.9 before 9.9.4-P2, and 9.6-ESV before…

PriorityP425low2.6CVSS 2.0
AVNACHAuNCNINAP
EPSS
31.67%
98.1th percentile
The query_findclosestnsec3 function in query.c in named in ISC BIND 9.6, 9.7, and 9.8 before 9.8.6-P2 and 9.9 before 9.9.4-P2, and 9.6-ESV before 9.6-ESV-R10-P2, allows remote attackers to cause a denial of service (INSIST assertion failure and daemon exit) via a crafted DNS query to an authoritative nameserver that uses the NSEC3 signing feature.

Affected

26 ranges· showing 25
VendorProductVersion rangeFixed in
debianbind9< bind9 1:9.9.5.dfsg-2 (bookworm)bind9 1:9.9.5.dfsg-2 (bookworm)
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind
iscbind9>= 0 < 1:9.9.5.dfsg-21:9.9.5.dfsg-2
iscbind9>= 0 < 1:9.9.5.dfsg-21:9.9.5.dfsg-2
iscbind9>= 0 < 1:9.9.5.dfsg-21:9.9.5.dfsg-2

Detection & IOCsextracted from sources · hover to see the quote

  • Target process is 'named' (BIND daemon); a crash (INSIST assertion failure in name.c) indicates exploitation attempt against an authoritative nameserver serving NSEC3-signed zones.
  • Recursive-only BIND servers are NOT vulnerable; detection/monitoring should focus exclusively on authoritative nameservers configured with at least one NSEC3-signed zone.
  • The vulnerable code path is query_findclosestnsec3() in query.c; crash stack traces referencing this function or name.c INSIST failures on an authoritative BIND server are strong indicators of exploitation.
  • ·Only BIND versions 9.6.0 and higher are affected (NSEC3 support was introduced in 9.6.0); servers running older versions are not vulnerable.
  • ·The vulnerability is only exploitable if the authoritative nameserver is actively serving at least one NSEC3-signed zone; NSEC3 is not automatically enabled by default.
  • ·The vulnerability is more reliably triggered on systems with newer glibc implementations; BIND on RHEL 5 (with older glibc) was assessed as not affected in practice.
  • ·No workaround is available; the only mitigation is patching to fixed versions (9.8.6-P2, 9.9.4-P2, or 9.6-ESV-R10-P2).

CVSS provenance

nvdv2.02.6LOWAV:N/AC:H/Au:N/C:N/I:N/A:P
osv2.6LOW
vendor_debian2.6LOW
vendor_redhat2.6LOW
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