The host_reliable_addrinfo function in support/export/hostname.c in nfs-utils before…
Priority LOW 38CWE-264Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-264.
Summary
The host_reliable_addrinfo function in support/export/hostname.c in nfs-utils before 1.2.4 does not properly use DNS to verify access to NFS exports, which allows remote attackers to mount filesystems by establishing crafted DNS A and PTR records.
Why it matters now
EPSS 0.02565 85th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:linux-nfs:nfs-utils:*:*:*:*:*:*:*:* | up to 1.2.3 | Vulnerable | Linux-nfs |
| cpe:2.3:a:linux-nfs:nfs-utils:1.2.0:*:*:*:*:*:*:* | 1.2.0 | Vulnerable | Linux-nfs |
| cpe:2.3:a:linux-nfs:nfs-utils:1.2.1:*:*:*:*:*:*:* | 1.2.1 | Vulnerable | Linux-nfs |
| cpe:2.3:a:linux-nfs:nfs-utils:1.2.2:*:*:*:*:*:*:* | 1.2.2 | Vulnerable | Linux-nfs |
- cpe:2.3:a:linux-nfs:nfs-utils:*:*:*:*:*:*:*:* Versions up to 1.2.3 Vulnerable ·Linux-nfs
- cpe:2.3:a:linux-nfs:nfs-utils:1.2.0:*:*:*:*:*:*:* Versions 1.2.0 Vulnerable ·Linux-nfs
- cpe:2.3:a:linux-nfs:nfs-utils:1.2.1:*:*:*:*:*:*:* Versions 1.2.1 Vulnerable ·Linux-nfs
- cpe:2.3:a:linux-nfs:nfs-utils:1.2.2:*:*:*:*:*:*:* Versions 1.2.2 Vulnerable ·Linux-nfs
Remediation
Red Hat 1 advisory
- RHSA-2011:1534 Released 2011-12-05 · Red Hat rating Lownfs-utils security, bug fix, and enhancement update
- Red Hat Enterprise Linux Desktop (v. 6) nfs-utils-1:1.2.3-15.el6
- Red Hat Enterprise Linux HPC Node (v. 6) nfs-utils-1:1.2.3-15.el6
- Red Hat Enterprise Linux Server (v. 6) nfs-utils-1:1.2.3-15.el6
- Red Hat Enterprise Linux Workstation (v. 6) nfs-utils-1:1.2.3-15.el6
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2011:1534 |
| Red Hat Enterprise Linux HPC Node (v. 6) | Fixed | RHSA-2011:1534 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2011:1534 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2011:1534 |
Not affected: 2 products
- Red Hat Enterprise Linux 4
- Red Hat Enterprise Linux 5
Timeline
- 2026-10-02 Threatist record created from CVE-2011-2500
- 2026-10-03 Alias added: GHSA-crxh-9828-m763
References
Advisory 1
More Linux-nfs Nfs-utils vulnerabilities
- TI-2003-00233 Off-by-one error in the xlog function of mountd in the Linux NFS utils package… CVSS 3.1CRITICAL 9.8
- TI-2019-02711 nfs-utils: root-owned files stored in insecure /var/lib/nfs directory CVSS 3.1CRITICAL 9.8
- TI-2025-11726 Nfs-utils: rpc.mountd in the nfs-utils privilege escalation CVSS 3.1MEDIUM 6.5
- TI-2013-01699 rpc-gssd in nfs-utils before 1.2.8 performs reverse DNS resolution for server names… CVSS 2.0LOW 3.2
- TI-2011-01528 The nfs_addmntent function in support/nfs/nfs_mntent.c in the mount.nsf tool in nfs-utils… CVSS 2.0LOW 3.3
Sources
- CVE-2011-2500 · CVE Program
- CVE-2011-2500 · NVD
- FIRST EPSS
- GHSA-crxh-9828-m763 · GitHub Advisory Database · CC BY 4.0
- CVE-2011-2500 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences