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
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.
- Published
- Feb 18, 2016
- Updated
- Jun 16, 2026
- EPSS
- 91.0% · 100th percentile
- CWE
- CWE-119
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Report tools
Action score
59
Plan
Add it to your regular patch cycle.
- CVSS
- 32 / 40 · 8.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 27 / 30 · 91.0%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| gnu | glibc | cpe:2.3:a:gnu:glibc |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| hp | helion openstack | cpe:2.3:a:hp:helion_openstack |
| hp | server migration pack | cpe:2.3:a:hp:server_migration_pack |
| sophos | unified threat management software | cpe:2.3:a:sophos:unified_threat_management_software |
| suse | linux enterprise debuginfo | cpe:2.3:a:suse:linux_enterprise_debuginfo |
| opensuse | opensuse | cpe:2.3:o:opensuse:opensuse |
| suse | linux enterprise desktop | cpe:2.3:o:suse:linux_enterprise_desktop |
| suse | linux enterprise server | cpe:2.3:o:suse:linux_enterprise_server |
| suse | linux enterprise software development kit | cpe:2.3:o:suse:linux_enterprise_software_development_kit |
| suse | suse linux enterprise server | cpe:2.3:o:suse:suse_linux_enterprise_server |
and 18 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux12.04
- canonical ubuntu linux14.04
- canonical ubuntu linux15.10
- debian debian linux8.0
- f5 big-ip access policy manager12.0.0
- f5 big-ip advanced firewall manager12.0.0
- f5 big-ip analytics12.0.0
- f5 big-ip application acceleration manager12.0.0
- f5 big-ip application security manager12.0.0
- f5 big-ip domain name system12.0.0
- f5 big-ip link controller12.0.0
- f5 big-ip local traffic manager12.0.0
- f5 big-ip policy enforcement manager12.0.0
- gnu glibc2.10
- gnu glibc2.10.1
- gnu glibc2.11
- gnu glibc2.11.1
- gnu glibc2.11.2
- gnu glibc2.11.3
- gnu glibc2.12
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | glibc | before 2.21-8 | 2.21-8 |
| Debian:6.0 | eglibc | before 2.11.3-4+deb6u11 | 2.11.3-4+deb6u11 |
| Debian:7 | eglibc | before 2.13-38+deb7u10 | 2.13-38+deb7u10 |
| Debian:8 | glibc | before 2.19-18+deb8u3 | 2.19-18+deb8u3 |
| Red Hat:enterprise_linux:6::client | glibc | before 0:2.12-1.166.el6_7.7 | 0:2.12-1.166.el6_7.7 |
| Red Hat:enterprise_linux:6::client | glibc-common | before 0:2.12-1.166.el6_7.7 | 0:2.12-1.166.el6_7.7 |
| Red Hat:enterprise_linux:6::client | glibc-debuginfo | before 0:2.12-1.166.el6_7.7 | 0:2.12-1.166.el6_7.7 |
| Red Hat:enterprise_linux:6::client | glibc-debuginfo-common | before 0:2.12-1.166.el6_7.7 | 0:2.12-1.166.el6_7.7 |
| Red Hat:enterprise_linux:6::client | glibc-devel | before 0:2.12-1.166.el6_7.7 | 0:2.12-1.166.el6_7.7 |
| Red Hat:enterprise_linux:6::client | glibc-headers | before 0:2.12-1.166.el6_7.7 | 0:2.12-1.166.el6_7.7 |
| Red Hat:enterprise_linux:6::client | glibc-static | before 0:2.12-1.166.el6_7.7 | 0:2.12-1.166.el6_7.7 |
| Red Hat:enterprise_linux:6::client | glibc-utils | before 0:2.12-1.166.el6_7.7 | 0:2.12-1.166.el6_7.7 |
| Red Hat:enterprise_linux:6::client | nscd | before 0:2.12-1.166.el6_7.7 | 0:2.12-1.166.el6_7.7 |
| Red Hat:enterprise_linux:6::hypervisor | rhev-hypervisor6 | before 0:6.7-20160104.2.el6ev | 0:6.7-20160104.2.el6ev |
| Red Hat:enterprise_linux:6::hypervisor | rhev-hypervisor7 | before 0:7.2-20160105.2.el6ev | 0:7.2-20160105.2.el6ev |
| Red Hat:enterprise_linux:7::client | glibc | before 0:2.17-106.el7_2.4 | 0:2.17-106.el7_2.4 |
| Red Hat:enterprise_linux:7::client | glibc-common | before 0:2.17-106.el7_2.4 | 0:2.17-106.el7_2.4 |
| Red Hat:enterprise_linux:7::client | glibc-debuginfo | before 0:2.17-106.el7_2.4 | 0:2.17-106.el7_2.4 |
| Red Hat:enterprise_linux:7::client | glibc-debuginfo-common | before 0:2.17-106.el7_2.4 | 0:2.17-106.el7_2.4 |
| Red Hat:enterprise_linux:7::client | glibc-devel | before 0:2.17-106.el7_2.4 | 0:2.17-106.el7_2.4 |
| Red Hat:enterprise_linux:7::client | glibc-headers | before 0:2.17-106.el7_2.4 | 0:2.17-106.el7_2.4 |
| Red Hat:enterprise_linux:7::client | glibc-static | before 0:2.17-106.el7_2.4 | 0:2.17-106.el7_2.4 |
| Red Hat:enterprise_linux:7::client | glibc-utils | before 0:2.17-106.el7_2.4 | 0:2.17-106.el7_2.4 |
| Red Hat:enterprise_linux:7::client | nscd | before 0:2.17-106.el7_2.4 | 0:2.17-106.el7_2.4 |
+60
Same product
gnu: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-4911Glibc: buffer overflow in ld.so leading to privilege escalationKEV85Now
- CVE-2015-0235Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and other 2.x versions before 2.18, allows context-depen68This week
- CVE-2024-2961The iconv() function in the GNU C Library versions 2.39 and older may overflow the output buffer passed to it by up to 4 bytes when converti55Plan
- CVE-2018-11236stdlib/canonicalize.c in the GNU C Library (aka glibc or libc6) 2.27 and earlier, when processing very long pathname arguments to the realpa41Plan
- CVE-2015-8779Stack-based buffer overflow in the catopen function in the GNU C Library (aka glibc or libc6) before 2.23 allows context-dependent attackers41Plan
- CVE-2015-8778Integer overflow in the GNU C Library (aka glibc or libc6) before 2.23 allows context-dependent attackers to cause a denial of service (appl41Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:eglibc | 2.11.3-4+deb6u11 · Debian:6.0 | Package registry (OSV) |
| debian:glibc | 2.21-8 · Debian:12 | Package registry (OSV) |
| red hat:glibc | 0:2.12-1.166.el6_7.7 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:glibc-common | 0:2.12-1.166.el6_7.7 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:glibc-debuginfo | 0:2.12-1.166.el6_7.7 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:glibc-debuginfo-common | 0:2.12-1.166.el6_7.7 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:glibc-devel | 0:2.12-1.166.el6_7.7 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:glibc-headers | 0:2.12-1.166.el6_7.7 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:glibc-static | 0:2.12-1.166.el6_7.7 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:glibc-utils | 0:2.12-1.166.el6_7.7 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:nscd | 0:2.12-1.166.el6_7.7 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:rhev-hypervisor6 | 0:6.7-20160104.2.el6ev · Red Hat:enterprise_linux:6::hypervisor | Package registry (OSV) |
| red hat:rhev-hypervisor7 | 0:7.2-20160105.2.el6ev · Red Hat:enterprise_linux:6::hypervisor | Package registry (OSV) |
| suse:certification-sles-eal4 | 12.0-0.16.1 · SUSE:Linux Enterprise Server 12 | Package registry (OSV) |
| suse:glibc | 2.11.3-17.45.66.1 · SUSE:Linux Enterprise Server 11 SP2-LTSS | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×2
- Proof-of-concept repository on GitHub ×11
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | dos | 2016-02-16 |
| Exploit-DB entry | remote | 2016-09-06 |
| Proof-of-concept repository on GitHub | stars:543 | 2016-02-10 |
| Proof-of-concept repository on GitHub | stars:5 | 2016-02-17 |
| Proof-of-concept repository on GitHub | stars:1 | 2016-02-17 |
| Proof-of-concept repository on GitHub | stars:0 | 2016-02-18 |
| Proof-of-concept repository on GitHub | stars:0 | 2016-02-21 |
| Proof-of-concept repository on GitHub | stars:8 | 2016-03-10 |
| Proof-of-concept repository on GitHub | stars:10 | 2016-04-05 |
| Proof-of-concept repository on GitHub | stars:0 | 2016-11-10 |
| Proof-of-concept repository on GitHub | stars:0 | 2019-06-04 |
| Proof-of-concept repository on GitHub | stars:0 | 2019-10-24 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- First PoC-9 d
- Published
- TodaySep 30, 2026+3877 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Buffer ManipulationCAPEC-123likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- fortiguard.com/advisory/glibc-getaddrinfo-stack-overflow
- lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html
- lists.fedoraproject.org/pipermail/package-announce/2016-February/177412.html
- lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html
- lists.opensuse.org/opensuse-security-announce/2016-02/msg00037.html
- lists.opensuse.org/opensuse-security-announce/2016-02/msg00038.html
- lists.opensuse.org/opensuse-security-announce/2016-02/msg00039.html
- lists.opensuse.org/opensuse-security-announce/2016-02/msg00042.html
- lists.opensuse.org/opensuse-security-announce/2016-02/msg00043.html
- lists.opensuse.org/opensuse-security-announce/2016-02/msg00044.html
- marc.info/?l=bugtraq&m=145596041017029&w=2
- marc.info/?l=bugtraq&m=145672440608228&w=2
- marc.info/?l=bugtraq&m=145690841819314&w=2
- marc.info/?l=bugtraq&m=145857691004892&w=2
- marc.info/?l=bugtraq&m=146161017210491&w=2
- packetstormsecurity.com/files/135802/glibc-getaddrinfo-Stack-Based-Buffer-Overflow.html
- packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html
- packetstormsecurity.com/files/164014/Moxa-Command-Injection-Cross-Site-Scripting-Vulnerable-Software.html
- packetstormsecurity.com/files/167552/Nexans-FTTO-GigaSwitch-Outdated-Components-Hardcoded-Backdoor.html
- rhn.redhat.com/errata/RHSA-2016-0175.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.