glibc: scanf implementation crashes on certain inputs
Published Oct 18, 2017
6.2
MEDIUMCVSS 3.0
EPSS 0.47%
Description
scanf and related functions in glibc before 2.15 allow local users to cause a denial of service (segmentation fault) via a large string of 0s.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
glibc
Will not fix
Red Hat Enterprise Linux 6
glibc
Will not fix
Red Hat Enterprise Linux 7
glibc
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | glibc | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | glibc | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | glibc | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the version of glibc package as shipped with Red Hat Enterprise Linux 5 and 6. Red Hat Product Security has rated this issue as having Low security impact. A future update in Red Hat Enterprise Linux 6 may address this issue. This issue did not affect the versions of glibc as shipped with Red Hat Enterprise Linux 7. Red Hat Enterprise Linux 5 is now in Extended Life Cycle phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates.
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:N/UI:N/S:U/C:N/I:N/A:H
AV:L/AC:L/Au:N/C:N/I:N/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
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.47% (0.00466) | 38.03th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.47% (0.00466) | 36.58th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00060) | 15.96th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.08% (0.00085) | 38.00th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.08% (0.00085) | 36.49th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00085) | 34.47th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.11% (0.01108) | 53.57th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.11% (0.01108) | 51.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.11% (0.01108) | 29.61th | v2 (v2022.01.01) |
References (9)
- http://www.openwall.com/lists/oss-security/2015/03/12/14 mailing-listx_refsource_MLISTThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2011-5320 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1196745 x_refsource_CONFIRMThird Party AdvisoryIssue Tracking
- https://marc.info/?l=gimp-developer&m=129567990905823&w=2 x_refsource_MISCExploit
- https://nvd.nist.gov/vuln/detail/CVE-2011-5320
- https://sourceware.org/bugzilla/show_bug.cgi?id=13138#c4 x_refsource_CONFIRMIssue Tracking
- https://sourceware.org/git/?p=glibc.git%3Ba=commitdiff%3Bh=20b38e0 x_refsource_CONFIRM
- https://sourceware.org/git/?p=glibc.git%3Ba=commitdiff%3Bh=3f8cc204fdd0 x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2011-5320
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2015/03/12/14 | mailing-listx_refsource_MLISTThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2011-5320 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1196745 | x_refsource_CONFIRMThird Party AdvisoryIssue Tracking | |
| https://marc.info/?l=gimp-developer&m=129567990905823&w=2 | x_refsource_MISCExploit | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-5320 | ||
| https://sourceware.org/bugzilla/show_bug.cgi?id=13138#c4 | x_refsource_CONFIRMIssue Tracking | |
| https://sourceware.org/git/?p=glibc.git%3Ba=commitdiff%3Bh=20b38e0 | x_refsource_CONFIRM | |
| https://sourceware.org/git/?p=glibc.git%3Ba=commitdiff%3Bh=3f8cc204fdd0 | x_refsource_CONFIRM | |
| https://www.cve.org/CVERecord?id=CVE-2011-5320 |
Change history (0)
No recorded changes yet.