#VU99928 Integer underflow in Linux kernel - CVE-2005-0530

Vulnerability identifier: #VU99928

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2005-0530

CWE-ID: CWE-191

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to gain access to sensitive information.

Signedness error in the copy_from_read_buf function in n_tty.c for Linux kernel 2.6.10 and 2.6.11rc1 allows local users to read kernel memory via a negative argument.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

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External links
https://www.guninski.com/where_do_you_want_billg_to_go_today_3.html
https://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=000930
https://www.novell.com/linux/security/advisories/2005_18_kernel.html
https://www.redhat.com/support/errata/RHSA-2005-366.html
https://marc.info/?l=full-disclosure&m=110846727602817&w=2
https://marc.info/?l=bugtraq&m=111091402626556&w=2
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10960
https://linux.bkbits.net:8080/linux-2.6/cset%40420181322LZmhPTewcCOLkubGwOL3w

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.