A null-pointer dereference vulnerability was found in libtirpc before version 0.3.3-rc3.
A null-pointer dereference vulnerability was found in libtirpc before version 0.3.3-rc3. The return value of makefd_xprt() was not checked in all instances, which could lead to a crash when the server exhausted the maximum number of available file descriptors. A remote attacker could cause an rpc-based application to crash by flooding it with new connections.
- Published
- Aug 30, 2018
- Updated
- Jun 16, 2026
- EPSS
- 3.9% · 90th percentile
- CWE
- CWE-252
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 3.9%
CNA vs NVD score
- NVD
- 7.5
- CNA · redhat
- 5.3
- 2.2 point gap
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| libtirpc project | libtirpc | cpe:2.3:a:libtirpc_project:libtirpc |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
| redhat | enterprise linux desktop | cpe:2.3:o:redhat:enterprise_linux_desktop |
| redhat | enterprise linux server aus | cpe:2.3:o:redhat:enterprise_linux_server_aus |
| redhat | enterprise linux server eus | cpe:2.3:o:redhat:enterprise_linux_server_eus |
| redhat | enterprise linux workstation | cpe:2.3:o:redhat:enterprise_linux_workstation |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux14.04
- canonical ubuntu linux16.04
- canonical ubuntu linux18.04
- debian debian linux8.0
- libtirpc project libtirpcbefore 0.3.3
- redhat enterprise linux7.0
- redhat enterprise linux desktop7.0
- redhat enterprise linux server aus7.4
- redhat enterprise linux server eus7.4
- redhat enterprise linux server eus7.5
- redhat enterprise linux server eus7.6
- redhat enterprise linux workstation7.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
[UNKNOWN] libtirpc
- 0.3.3-rc3affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | libtirpc | before 0.2.5-1.3 | 0.2.5-1.3 |
| Debian:8 | libtirpc | before 0.2.5-1+deb8u2 | 0.2.5-1+deb8u2 |
| Red Hat:enterprise_linux:7::client | libtirpc | before 0:0.2.4-0.10.el7 | 0:0.2.4-0.10.el7 |
| Red Hat:enterprise_linux:7::client | libtirpc-debuginfo | before 0:0.2.4-0.10.el7 | 0:0.2.4-0.10.el7 |
| Red Hat:enterprise_linux:7::client | libtirpc-devel | before 0:0.2.4-0.10.el7 | 0:0.2.4-0.10.el7 |
| SUSE:Linux Enterprise Software Development Kit 11 SP4 | libtirpc | before 0.2.1-1.13.6.1 | 0.2.1-1.13.6.1 |
Same product
libtirpc project: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-46828In libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that uses libtirpc because idle TCP connection31Monitor
- CVE-2018-14621An infinite loop vulnerability was found in libtirpc before version 1.0.2-rc2.31Monitor
- CVE-2013-1950The svc_dg_getargs function in libtirpc 0.2.3 and earlier allows remote attackers to cause a denial of service (rpcbind crash) via a Sun RPC19Monitor
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:libtirpc | 0.2.5-1.3 · Debian:12 | Package registry (OSV) |
| red hat:libtirpc | 0:0.2.4-0.10.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libtirpc-debuginfo | 0:0.2.4-0.10.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libtirpc-devel | 0:0.2.4-0.10.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| suse:libtirpc | 0.2.1-1.13.6.1 · SUSE:Linux Enterprise Software Development Kit 11 SP4 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
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.
No dated events beyond publication.
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
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
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.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-252 · Unchecked Return ValueCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
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
- git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=1c77f7a869bdea2a34799d774460d1f9983d45f0
- access.redhat.com/errata/RHBA-2017:1991
- bugzilla.novell.com/show_bug.cgi?id=968175
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14622
- lists.debian.org/debian-lts-announce/2018/08/msg00034.html
- usn.ubuntu.com/3759-1/
- usn.ubuntu.com/3759-2/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.