Security readout for executives and security teams
This is an old local-file overwrite flaw in GNU sharutils unshar. A local user could abuse predictable temporary file handling to cause unshar to overwrite files through a symbolic link. Business risk is mainly legacy Linux or Unix systems where sharutils remains installed and is used by privileged users or automation. Exposure is most plausible on legacy systems with sharutils/unshar installed, especially versions matching sharutils 4.2.1 or distributor packages covered by the 2005 Ubuntu, Red Hat, Debian, OVAL, SecurityFocus, and IBM X-Force references. Prioritize as a legacy remediation and hardening item, not an internet-wide emergency. Patch or remove sharutils where found, especially on multi-user systems or servers with privileged archive-processing workflows. Mitigation focus: Apply vendor sharutils updates from the relevant operating system distributor.; Remove sharutils or unshar from systems where it is not required.; Avoid running unshar with elevated privileges on unverified archives..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2005-0990 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- oval:org.mitre.oval:def:9613CVE reference · vdb-entry, signature
- https://bugzilla.ubuntu.com/show_bug.cgi?id=8459CVE reference · x_refsource_MISC
- sharutils-temp-file-symlink(19957)CVE reference · vdb-entry, x_refsource_XF
- USN-104-1CVE reference · vendor-advisory, x_refsource_UBUNTU
Products and packages named in the record
CWE details
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