nss: Heap-buffer-overflow in __hash_open
Published Dec 27, 2017
7.8
HIGHCVSS 3.0
EPSS 0.74%
Description
Heap-based buffer overflow in the __hash_open function in lib/dbm/src/hash.c in Mozilla Network Security Services (NSS) allows context-dependent attackers to have unspecified impact using a crafted cert8.db file.
Affected products
No data.
- n/a
No data.
Red Hat Enterprise Linux 5
nss
Not affected
Red Hat Enterprise Linux 6
nss
Not affected
Red Hat Enterprise Linux 7
nss
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | nss | Not affected | n/a |
| Red Hat Enterprise Linux 6 | nss | Not affected | n/a |
| Red Hat Enterprise Linux 7 | nss | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
NSS uses a local DBM database to store configuration and security (Certificates etc) information. These database files are created by NSS during startup and is used during its normal operation. These files are not read/retrieved from an external source. This flaw is related to specially-crafted NSS DBM files. So the only way to exploit this flaw is to replace the local NSS db with these files which require local user access on the machine running NSS. Therefore Red Hat Product Security does not consider this as a security flaw.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:L/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.74% (0.00736) | 52.77th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.73% (0.00730) | 49.26th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00094) | 24.39th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.09% (0.00088) | 39.43th | v3 (v2023.03.01) |
| Jun 26, 2024 | 0.09% (0.00088) | 38.10th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.09% (0.00088) | 36.09th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.45% (0.01454) | 32.67th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.45% (0.01454) | 0.00th | v1 |
References (10)
- http://packetstormsecurity.com/files/143735/NSS-Buffer-Overflows-Floating-Point-Exception.html x_refsource_MISCThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2017/Aug/17 mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory
- http://www.geeknik.net/9brdqk6xu x_refsource_MISCExploitThird Party Advisory
- http://www.securityfocus.com/bid/100345 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039153 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2017-11696 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1487129 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2017-11696
- https://security.gentoo.org/glsa/202003-37 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2017-11696
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/143735/NSS-Buffer-Overflows-Floating-Point-Exception.html | x_refsource_MISCThird Party AdvisoryVDB Entry | |
| http://seclists.org/fulldisclosure/2017/Aug/17 | mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory | |
| http://www.geeknik.net/9brdqk6xu | x_refsource_MISCExploitThird Party Advisory | |
| http://www.securityfocus.com/bid/100345 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1039153 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2017-11696 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1487129 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-11696 | ||
| https://security.gentoo.org/glsa/202003-37 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2017-11696 |
Change history (0)
No recorded changes yet.