glibc: buffer overflow in gethostbyname_r() and related functions with misaligned buffer
Published Sep 28, 2015
6.8
MEDIUMCVSS 2.0
EPSS 5.01%
Description
Buffer overflow in the gethostbyname_r and other unspecified NSS functions in the GNU C Library (aka glibc or libc6) before 2.22 allows context-dependent attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response, which triggers a call with a misaligned buffer.
Affected products
No data.
Configuration 1
- 11
- 11
- 11
- 11
- 11
- 11
- 11
Configuration 3
- 7.0
Configuration 4
- 12.04
- 14.04
- 15.04
No data.
Red Hat Enterprise Linux 6
glibc-0:2.12-1.149.el6_6.7
Fixed · RHSA-2015:0863
Red Hat Enterprise Linux 7
glibc-0:2.17-105.el7
Fixed · RHSA-2015:2199
Red Hat Enterprise Linux 7.1 Extended Update Support
glibc-0:2.17-79.ael7b_1
Fixed · RHSA-2015:2589
Red Hat Enterprise Linux 5
glibc
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | glibc-0:2.12-1.149.el6_6.7 | Fixed | RHSA-2015:0863 |
| Red Hat Enterprise Linux 7 | glibc-0:2.17-105.el7 | Fixed | RHSA-2015:2199 |
| Red Hat Enterprise Linux 7.1 Extended Update Support | glibc-0:2.17-79.ael7b_1 | Fixed | RHSA-2015:2589 |
| Red Hat Enterprise Linux 5 | glibc | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/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 2, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 5.01% (0.05012) | 91.99th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.47% (0.05470) | 91.71th | v5 (v2026.06.15) |
| May 13, 2026 | 4.75% (0.04751) | 89.53th | v4 (v2025.03.14) |
| Dec 28, 2025 | 7.79% (0.07793) | 91.66th | v4 (v2025.03.14) |
| Dec 27, 2025 | 5.08% (0.05081) | 89.50th | v4 (v2025.03.14) |
| Oct 28, 2025 | 7.79% (0.07793) | 91.56th | v4 (v2025.03.14) |
| Oct 27, 2025 | 5.08% (0.05081) | 89.34th | v4 (v2025.03.14) |
| Oct 1, 2025 | 7.79% (0.07793) | 91.66th | v4 (v2025.03.14) |
| May 10, 2025 | 5.08% (0.05081) | 89.22th | v4 (v2025.03.14) |
| Mar 17, 2025 | 7.72% (0.07725) | 91.31th | v4 (v2025.03.14) |
| Dec 17, 2024 | 12.90% (0.12903) | 95.48th | v3 (v2023.03.01) |
| Sep 4, 2024 | 8.17% (0.08167) | 94.46th | v3 (v2023.03.01) |
| Jun 4, 2024 | 10.49% (0.10488) | 95.02th | v3 (v2023.03.01) |
| Oct 28, 2023 | 12.30% (0.12299) | 94.78th | v3 (v2023.03.01) |
| Mar 7, 2023 | 13.33% (0.13334) | 94.62th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.23% (0.04229) | 87.47th | v2 (v2022.01.01) |
| Feb 13, 2023 | 4.23% (0.04229) | 87.08th | v2 (v2022.01.01) |
| Feb 3, 2023 | 4.42% (0.04421) | 87.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.23% (0.04229) | 86.19th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.23% (0.04229) | 69.94th | v2 (v2022.01.01) |
References (18)
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html vendor-advisoryx_refsource_FEDORAMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00019.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://www.debian.org/security/2016/dsa-3480 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/74255 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1032178 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2985-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2985-2 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2015-1781 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1199525 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-1781
- https://rhn.redhat.com/errata/RHSA-2015-0863.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://security.gentoo.org/glsa/201602-02 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=18287 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=2959eda9272a03386 x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2015-1781
- https://www.sourceware.org/ml/libc-alpha/2015-08/msg00609.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
Change history (0)
No recorded changes yet.