CVE-2015-5477
HighExploitedPublic exploitnamed in ISC BIND 9.x before 9.9.7-P2 and 9.10.x before 9.10.2-P3 allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) via TKEY queries.
Published Jul 29, 2015 · Updated Oct 9, 2026 · Also known as DEBIAN-CVE-2015-5477, DLA-285-1, DSA-3319-1, SUSE-SU-2015:1304-1, SUSE-SU-2015:1305-1, SUSE-SU-2015:1316-1, UBUNTU-CVE-2015-5477
Key Facts
Patch immediately- CVE-2015-5477 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting DNS (Hpe), Vcx (Hpe), Bind (Isc) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 2, 2015. Public exploit code is available.
- EPSS estimates a 99% probability of exploitation in the next 30 days.
- Fixed versions are available, including Bind 30:9.3.6-25.P1.el5_11.3, Bind 32:9.8.2-0.17.rc1.el6_4.7, Bind 32:9.8.2-0.30.rc1.38.amzn1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
99%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2015-5477 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
named in ISC BIND 9.x before 9.9.7-P2 and 9.10.x before 9.10.2-P3 allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) via TKEY queries.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Oct 8, 2026 | Oct 11, 2026 | Not reported |
| Industry KEV feed | Aug 2, 2015 | Oct 11, 2026 | Not reported |
| CIRCL KEV | Oct 8, 2026 | Oct 11, 2026 | Not reported |
| ENISA EUVD | Oct 8, 2026 | n/a | Not reported |
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Affected Products
355 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| DNSHpe | 9.2.3, 9.3 | n/a |
| VcxHpe | See advisory | 9.8.18 |
| BindIsc | 9.10.2-p1 | 9.9.7 |
| Clustered Data OntapNetapp | See advisory | n/a |
| Vm ServerOracle | 3.2 | n/a |
Patched Releases
Bind
30:9.3.6-25.P1.el5_11.3, 32:9.8.2-0.17.rc1.el6_4.7, 32:9.8.2-0.30.rc1.38.amzn1, 32:9.8.2-0.37.rc1.el6_7.2, 32:9.9.4-18.ael7b_1.3, 32:9.9.4-18.el7_1.3, 9.10.3P4-21.1, 9.6ESVR11W1-0.6.1, 9.9.4P2-66.1, 9.9.6P1-0.12.1, 9.9.6P1-23.1, 9.10.2, 9.9.7
bind-chroot
30:9.3.6-25.P1.el5_11.3, 32:9.8.2-0.30.rc1.38.amzn1, 32:9.8.2-0.37.rc1.el6_7.2, 32:9.9.4-18.el7_1.3
bind-chrootenv
9.10.3P4-21.1, 9.6ESVR11W1-0.6.1, 9.9.4P2-66.1, 9.9.6P1-0.12.1, 9.9.6P1-23.1
bind-debuginfo
9.9.4P2-66.1
bind-debugsource
9.9.4P2-66.1
bind-devel
30:9.3.6-25.P1.el5_11.3, 32:9.8.2-0.30.rc1.38.amzn1, 32:9.8.2-0.37.rc1.el6_7.2, 32:9.9.4-18.el7_1.3, 9.10.3P4-21.1, 9.6ESVR11W1-0.6.1, 9.9.4P2-66.1, 9.9.6P1-0.12.1, 9.9.6P1-23.1
bind-devel-32bit
9.10.3P4-21.1, 9.9.6P1-0.12.1
bind-doc
9.10.3P4-21.1, 9.6ESVR11W1-0.6.1, 9.9.4P2-66.1, 9.9.6P1-0.12.1, 9.9.6P1-23.1
bind-libbind-devel
30:9.3.6-25.P1.el5_11.3
bind-libs
30:9.3.6-25.P1.el5_11.3, 32:9.8.2-0.30.rc1.38.amzn1, 32:9.8.2-0.37.rc1.el6_7.2, 32:9.9.4-18.el7_1.3, 9.6ESVR11W1-0.6.1, 9.9.4P2-66.1, 9.9.6P1-0.12.1, 9.9.6P1-23.1
bind-libs-32bit
9.6ESVR11W1-0.6.1, 9.9.4P2-66.1, 9.9.6P1-0.12.1, 9.9.6P1-23.1
bind-libs-debuginfo
9.9.4P2-66.1
bind-libs-debuginfo-32bit
9.9.4P2-66.1
bind-libs-debuginfo-x86
9.9.4P2-66.1
bind-libs-lite
32:9.9.4-18.el7_1.3
bind-libs-x86
9.9.4P2-66.1, 9.9.6P1-0.12.1
bind-license
32:9.9.4-18.el7_1.3
bind-lite-devel
32:9.9.4-18.el7_1.3
bind-lwresd
9.10.3P4-21.1, 9.9.4P2-66.1
bind-lwresd-debuginfo
9.9.4P2-66.1
bind-sdb
30:9.3.6-25.P1.el5_11.3, 32:9.8.2-0.30.rc1.38.amzn1, 32:9.8.2-0.37.rc1.el6_7.2, 32:9.9.4-18.el7_1.3
bind-sdb-chroot
32:9.9.4-18.el7_1.3
bind-utils
30:9.3.6-25.P1.el5_11.3, 32:9.8.2-0.30.rc1.38.amzn1, 32:9.8.2-0.37.rc1.el6_7.2, 32:9.9.4-18.el7_1.3, 9.10.3P4-21.1, 9.6ESVR11W1-0.6.1, 9.9.4P2-66.1, 9.9.6P1-0.12.1, 9.9.6P1-23.1
bind-utils-debuginfo
9.9.4P2-66.1
bind9
1:9.7.3.dfsg-1~squeeze16, 1:9.8.4.dfsg.P1-6+nmu2+deb7u6, 1:9.9.5.dfsg-11, 1:9.9.5.dfsg-3ubuntu0.4, 1:9.9.5.dfsg-9+deb8u2
Timeline
Publicly disclosed
Jul 29, 2015
Added to Industry KEV feed
Aug 2, 2015
Added to CISA KEV
Oct 8, 2026
Added to CIRCL KEV
Oct 8, 2026
Added to ENISA EUVD
Oct 8, 2026
Last updated
Oct 9, 2026
Weakness Type
- CWE-19
- CWE-456 Missing Initialization of a Variable
- CWE-617 Reachable Assertion
References
- advisoryRHSA-2015:1513
- advisoryRHSA-2015:1514
- advisoryRHSA-2015:1515
- advisoryRHSA-2016:0078
- advisoryRHSA-2016:0079
FAQ
Common Questions.
named in ISC BIND 9.x before 9.9.7-P2 and 9.10.x before 9.10.2-P3 allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) via TKEY queries.
Affected: DNS (Hpe) versions 9.2.3, 9.3; Vcx (Hpe); Bind (Isc) versions 9.10.2-p1, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 2, 2015.
Yes. It was added on Oct 8, 2026 with a federal remediation due date of Oct 11, 2026.
Public exploit code is available.
Fixed versions are available, including Bind 30:9.3.6-25.P1.el5_11.3, Bind 32:9.8.2-0.17.rc1.el6_4.7, Bind 32:9.8.2-0.30.rc1.38.amzn1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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