CVE-2015-7547
HighExploitedPublic exploitMultiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc or libc6) before 2.23 allow remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted DNS…
Published Feb 18, 2016 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2015-7547, DLA-416-1, DSA-3481-1, SUSE-RU-2016:0496-1, UBUNTU-CVE-2015-7547, USN-2900-1
Key Facts
Patch immediately- CVE-2015-7547 is a high-severity vulnerability (CVSS 8.1 v3.1) affecting Big-Ip Access Policy Manager (F5), Big-Ip Advanced Firewall Manager (F5), Big-Ip Analytics (F5) and 22 more products.
- It is exploited in the wild, listed in Industry KEV feed since Aug 17, 2021. Public exploit code is available.
- EPSS estimates a 91% probability of exploitation in the next 30 days.
- Fixed versions are available, including certification-sles-eal4 12.0-0.16.1, eglibc 2.11.3-4+deb6u11, eglibc 2.13-38+deb7u10.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.1
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
91%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2015-7547 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc or libc6) before 2.23 allow remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted DNS response that triggers a call to the getaddrinfo function with the AF_UNSPEC or AF_INET6 address family, related to performing "dual A/AAAA DNS queries" and the libnss_dns.so.2 NSS module.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Aug 17, 2021 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
383 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Big-Ip Access Policy ManagerF5 | 12.0.0 | n/a |
| Big-Ip Advanced Firewall ManagerF5 | 12.0.0 | n/a |
| Big-Ip AnalyticsF5 | 12.0.0 | n/a |
| Big-Ip Application Acceleration ManagerF5 | 12.0.0 | n/a |
| Big-Ip Application Security ManagerF5 | 12.0.0 | n/a |
Patched Releases
certification-sles-eal4
12.0-0.16.1
eglibc
2.11.3-4+deb6u11, 2.13-38+deb7u10, 2.19-0ubuntu6.7
Glibc
0:2.12-1.47.el6_2.17, 0:2.17-106.el7_2.4, 0:2.17-79.ael7b_1.4, 2.11.3-17.45.66.1, 2.11.3-17.95.2, 2.12-1.166.el6_7.7, 2.12-1.212.el6_10.3+sp999, 2.17-106.0.1.el7_2.4, 2.17-106.166.amzn1, 2.19-16.22.2, 2.19-18+deb8u3, 2.19-19.1, 2.19-22.13.1, 2.19-35.1, 2.21-8, 2.22-8.ph1, 2.24-2.3
glibc-32bit
2.11.3-17.45.66.1, 2.11.3-17.95.2, 2.19-16.22.2, 2.19-19.1, 2.19-22.13.1, 2.19-35.1, 2.24-2.3
glibc-common
2.12-1.166.el6_7.7, 2.17-106.0.1.el7_2.4, 2.17-106.166.amzn1
glibc-debuginfo
2.19-16.22.2
glibc-debuginfo-32bit
2.19-16.22.2
glibc-debuginfo-common
2.17-106.166.amzn1
glibc-debugsource
2.19-16.22.2
glibc-devel
2.11.3-17.45.66.1, 2.11.3-17.95.2, 2.12-1.166.el6_7.7, 2.17-106.0.1.el7_2.4, 2.17-106.166.amzn1, 2.19-16.22.2, 2.19-19.1, 2.19-22.13.1, 2.19-35.1, 2.24-2.3
glibc-devel-32bit
2.11.3-17.45.66.1, 2.11.3-17.95.2, 2.19-16.22.2, 2.19-19.1, 2.19-22.13.1, 2.19-35.1, 2.24-2.3
glibc-devel-debuginfo
2.19-16.22.2
glibc-devel-debuginfo-32bit
2.19-16.22.2
glibc-devel-static
2.19-16.22.2, 2.19-19.1, 2.19-22.13.1, 2.19-35.1, 2.24-2.3
glibc-devel-static-32bit
2.19-16.22.2, 2.19-19.1, 2.24-2.3
glibc-extra
2.19-16.22.2, 2.19-19.1, 2.24-2.3
glibc-extra-debuginfo
2.19-16.22.2
glibc-headers
2.12-1.166.el6_7.7, 2.17-106.0.1.el7_2.4, 2.17-106.166.amzn1
glibc-html
2.11.3-17.45.66.1, 2.11.3-17.95.2, 2.19-16.22.2, 2.19-19.1, 2.19-22.13.1, 2.19-35.1, 2.24-2.3
glibc-i18ndata
2.11.3-17.45.66.1, 2.11.3-17.95.2, 2.19-16.22.2, 2.19-19.1, 2.19-22.13.1, 2.19-35.1, 2.24-2.3
glibc-info
2.11.3-17.45.66.1, 2.11.3-17.95.2, 2.19-16.22.2, 2.19-19.1, 2.19-22.13.1, 2.19-35.1, 2.24-2.3
glibc-locale
2.11.3-17.45.66.1, 2.11.3-17.95.2, 2.19-16.22.2, 2.19-19.1, 2.19-22.13.1, 2.19-35.1, 2.24-2.3
glibc-locale-32bit
2.11.3-17.45.66.1, 2.11.3-17.95.2, 2.19-16.22.2, 2.19-19.1, 2.19-22.13.1, 2.19-35.1, 2.24-2.3
glibc-locale-debuginfo
2.19-16.22.2
glibc-locale-debuginfo-32bit
2.19-16.22.2
Timeline
Publicly disclosed
Feb 18, 2016
Added to Industry KEV feed
Aug 17, 2021
Last updated
Aug 4, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-121 Stack-based Buffer Overflow
References
- advisorySUSE-SU-2016:0470
- advisorySUSE-SU-2016:0471
- advisorySUSE-SU-2016:0472
- advisorySUSE-SU-2016:0473
- advisoryopenSUSE-SU-2016:0510
FAQ
Common Questions.
Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc or libc6) before 2.23 allow remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted DNS response that triggers a call to the getaddr…
Affected: Big-Ip Access Policy Manager (F5) versions 12.0.0; Big-Ip Advanced Firewall Manager (F5) versions 12.0.0; Big-Ip Analytics (F5) versions 12.0.0, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Aug 17, 2021.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including certification-sles-eal4 12.0-0.16.1, eglibc 2.11.3-4+deb6u11, eglibc 2.13-38+deb7u10.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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