HIGH
musl libc before 1.1.17 has a buffer overflow via crafted DNS replies because dns_parse_callback in network/lookup_name.c does not restrict the number of addresses, and thus an attacker can provide an unexpected number by sending A records in a reply to an AAAA query
Published Oct 19, 2017
7.5
HIGHCVSS 3.0
EPSS 2.02%
Description
musl libc before 1.1.17 has a buffer overflow via crafted DNS replies because dns_parse_callback in network/lookup_name.c does not restrict the number of addresses, and thus an attacker can provide an unexpected number by sending A records in a reply to an AAAA query.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.02% 0.02015
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.02015
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.02% (0.02015) | 80.18th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.02% (0.02015) | 78.29th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.41% (0.00410) | 74.10th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.41% (0.00410) | 73.19th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.41% (0.00410) | 69.81th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Sep 2, 2022 | 0.95% (0.00954) | 34.50th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v1 |
| Jan 6, 2022 | 0.83% (0.00833) | 23.96th | v1 |
| Sep 1, 2021 | 0.83% (0.00833) | 57.50th | v1 |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
Weaknesses (1)
References (3)
- http://git.musl-libc.org/cgit/musl/commit/?id=45ca5d3fcb6f874bf5ba55d0e9651cef68515395 x_refsource_CONFIRMVendor Advisory
- http://git.musl-libc.org/cgit/musl/tree/WHATSNEW x_refsource_CONFIRMVendor Advisory
- http://openwall.com/lists/oss-security/2017/10/19/5 x_refsource_CONFIRMMailing ListMitigationThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://git.musl-libc.org/cgit/musl/commit/?id=45ca5d3fcb6f874bf5ba55d0e9651cef68515395 | x_refsource_CONFIRMVendor Advisory | |
| http://git.musl-libc.org/cgit/musl/tree/WHATSNEW | x_refsource_CONFIRMVendor Advisory | |
| http://openwall.com/lists/oss-security/2017/10/19/5 | x_refsource_CONFIRMMailing ListMitigationThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Oct 19, 2017
Updated Aug 5, 2024
Reserved Oct 19, 2017
Link CVE-2017-15650
CISA Vulnrichment
Updated n/a