rsync: CPU consumption denial of service when authenticating with a non-existent username
Published Apr 23, 2014
7.8
HIGHCVSS 2.0
EPSS 4.12%
Description
The check_secret function in authenticate.c in rsync 3.1.0 and earlier allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a user name which does not exist in the secrets file.
Affected products
No data.
- ≤ 3.1.0
- 2.6.9
- 2.7.0
- 2.7.1
- 2.7.2
- 2.7.3
- 2.7.4
- 2.7.5
- 2.7.6
- 2.7.7
- 2.7.8
- 2.7.9
- 2.8.0
- 2.8.1
- 2.8.2
- 2.8.3
- 2.8.4
- 2.8.5
- 2.8.6
- 2.8.7
- 2.8.8
- 2.8.9
- 2.9.0
- 2.9.1
- 2.9.2
- 2.9.3
- 2.9.4
- 2.9.5
- 2.9.6
- 2.9.7
- 2.9.8
- 2.9.9
- 3.0.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
- 3.0.9
No data.
Red Hat Enterprise Linux 5
rsync
Not affected
Red Hat Enterprise Linux 6
rsync
Not affected
Red Hat Enterprise Linux 7
rsync
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | rsync | Not affected | n/a |
| Red Hat Enterprise Linux 6 | rsync | Not affected | n/a |
| Red Hat Enterprise Linux 7 | rsync | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of rsync as shipped with Red Hat Enterprise Linux 5 and 6.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:C
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 2, 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 (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 4.12% (0.04119) | 90.48th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.09% (0.04086) | 89.37th | v5 (v2026.06.15) |
| Oct 1, 2025 | 17.19% (0.17189) | 94.81th | v4 (v2025.03.14) |
| Jul 20, 2025 | 18.32% (0.18317) | 94.91th | v4 (v2025.03.14) |
| Mar 30, 2025 | 20.63% (0.20633) | 95.10th | v4 (v2025.03.14) |
| Mar 29, 2025 | 12.41% (0.12411) | 89.81th | v4 (v2025.03.14) |
| Mar 17, 2025 | 20.63% (0.20633) | 95.12th | v4 (v2025.03.14) |
| Dec 12, 2024 | 4.73% (0.04726) | 92.97th | v3 (v2023.03.01) |
| Dec 4, 2023 | 4.73% (0.04726) | 91.74th | v3 (v2023.03.01) |
| Nov 8, 2023 | 3.97% (0.03969) | 91.02th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.11% (0.04112) | 90.81th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (15)
- http://advisories.mageia.org/MGASA-2015-0065.html x_refsource_CONFIRM
- http://lists.fedoraproject.org/pipermail/package-announce/2014-April/131910.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-updates/2014-05/msg00006.html vendor-advisoryx_refsource_SUSE
- http://secunia.com/advisories/57948 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:131 vendor-advisoryx_refsource_MANDRIVA
- http://www.openwall.com/lists/oss-security/2014/04/14/5 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2014/04/15/1 mailing-listx_refsource_MLIST
- http://www.ubuntu.com/usn/USN-2171-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2014-2855 Vendor Advisory
- https://bugs.launchpad.net/ubuntu/+source/rsync/+bug/1307230 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1087841 Issue Tracking
- https://bugzilla.samba.org/show_bug.cgi?id=10551 x_refsource_CONFIRMVendor Advisory
- https://git.samba.org/?p=rsync.git%3Ba=commit%3Bh=0dedfbce2c1b851684ba658861fe9d620636c56a x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2014-2855
- https://www.cve.org/CVERecord?id=CVE-2014-2855
Change history (0)
No recorded changes yet.