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CVE-2026-18477

Опубликовано: 07 авг. 2026
Источник: msrc
CVSS3: 4.4
EPSS Низкий

Описание

Tar: tar: toctou in incremental dumpdir 'x' rename handling allows restore path escape

Обновления

ПродуктСтатьяОбновление
azl3 tar 1.35-2 on Azure Linux 3.0
azl3 tar 1.35-3 on Azure Linux 3.0
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Показывать по

EPSS

Процентиль: 1%
0.00104
Низкий

4.4 Medium

CVSS3

Связанные уязвимости

CVSS3: 4.4
ubuntu
3 месяца назад

A TOCTOU (Time-of-Check Time-of-Use) vulnerability in GNU tar's incremental dumpdir 'X' rename handling allows a local attacker with write access to a directory being backed up to influence the restore process if the attacker has access to the system where the restore is being performed. During restoration, files or directories may be created, renamed or overwritten outside the intended extraction directory. This could lead to unauthorized file modification or, in some cases, privilege escalation. Exploitation does not require the attacker to modify or craft the archive, and standard backup and restore workflows—including extracting into a newly created directory without using the -P option do not mitigate the issue.

CVSS3: 4.4
redhat
3 месяца назад

A TOCTOU (Time-of-Check Time-of-Use) vulnerability in GNU tar's incremental dumpdir 'X' rename handling allows a local attacker with write access to a directory being backed up to influence the restore process if the attacker has access to the system where the restore is being performed. During restoration, files or directories may be created, renamed or overwritten outside the intended extraction directory. This could lead to unauthorized file modification or, in some cases, privilege escalation. Exploitation does not require the attacker to modify or craft the archive, and standard backup and restore workflows—including extracting into a newly created directory without using the -P option do not mitigate the issue.

CVSS3: 4.4
nvd
3 месяца назад

A TOCTOU (Time-of-Check Time-of-Use) vulnerability in GNU tar's incremental dumpdir 'X' rename handling allows a local attacker with write access to a directory being backed up to influence the restore process if the attacker has access to the system where the restore is being performed. During restoration, files or directories may be created, renamed or overwritten outside the intended extraction directory. This could lead to unauthorized file modification or, in some cases, privilege escalation. Exploitation does not require the attacker to modify or craft the archive, and standard backup and restore workflows—including extracting into a newly created directory without using the -P option do not mitigate the issue.

CVSS3: 4.4
debian
3 месяца назад

A TOCTOU (Time-of-Check Time-of-Use) vulnerability in GNU tar's increm ...

CVSS3: 4.4
redos
22 дня назад

Уязвимость tar

EPSS

Процентиль: 1%
0.00104
Низкий

4.4 Medium

CVSS3