Race condition in bzip2 1.0.2 and earlier allows local users to modify permissions of arbitrary files via a hard link attack on a file while it is being decompressed, whose permissions are changed by bzip2 after the decompression is complete.
Conclusion & alert: CVE-2005-0953 is rated Low Risk (23/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.09%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-03-17 | 0.35% | 0.09% | -0.26% |
| 2 | 2024-12-17 | 0.06% | 0.35% | +0.29% |
| 3 | 2023-03-07 | — | 0.06% | — |
Full EPSS history (4 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 3.7 | 2.0 | LOW |
|
1.9 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2005-0953 not yet assigned priority: Debian including 1 source packages (bzip2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2005-0953 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2005-0953 |
ubuntu
|
medium | CVE-2005-0953 medium priority: Ubuntu including 1 source packages (bzip2), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. | https://ubuntu.com/security/CVE-2005-0953 |
Red Hat Enterprise Linux 5 is not vulnerable to this issue as it contains a backported patch.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| bzip | bzip2 | 0.9 | cpe:2.3:a:bzip:bzip2:0.9:*:*:*:*:*:*:* |
| bzip | bzip2 | 0.9.5_a | cpe:2.3:a:bzip:bzip2:0.9.5_a:*:*:*:*:*:*:* |
| bzip | bzip2 | 0.9.5_b | cpe:2.3:a:bzip:bzip2:0.9.5_b:*:*:*:*:*:*:* |
| bzip | bzip2 | 0.9.5_c | cpe:2.3:a:bzip:bzip2:0.9.5_c:*:*:*:*:*:*:* |
| bzip | bzip2 | 0.9.5_d | cpe:2.3:a:bzip:bzip2:0.9.5_d:*:*:*:*:*:*:* |
| bzip | bzip2 | 0.9_a | cpe:2.3:a:bzip:bzip2:0.9_a:*:*:*:*:*:*:* |
| bzip | bzip2 | 0.9_b | cpe:2.3:a:bzip:bzip2:0.9_b:*:*:*:*:*:*:* |
| bzip | bzip2 | 0.9_c | cpe:2.3:a:bzip:bzip2:0.9_c:*:*:*:*:*:*:* |
| bzip | bzip2 | 1.0 | cpe:2.3:a:bzip:bzip2:1.0:*:*:*:*:*:*:* |
| bzip | bzip2 | 1.0.1 | cpe:2.3:a:bzip:bzip2:1.0.1:*:*:*:*:*:*:* |
| bzip | bzip2 | 1.0.2 | cpe:2.3:a:bzip:bzip2:1.0.2:*:*:*:*:*:*:* |