SB2018122014 - Denial of service in libarchive

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Main Vulnerability Database SB2018122014

SB2018122014 - Denial of service in libarchive

Published: December 27, 2018 Updated: December 27, 2018

Security Bulletin ID SB2018122014
Severity
Low
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 secuirty vulnerabilities.


1) Double-free error (CVE-ID: CVE-2018-1000877)

The vulnerability allows a remote attacker to cause DoS condition.

The vulnerability exists due to double-free error in RAR decoder - libarchive/archive_read_support_format_rar.c, parse_codes(), realloc(rar->lzss.window, new_size) with new_size = 0. A remote attacker can trick the victim into opening a specially crafted RAR archive and cause the service to crash.


2) Use-after-free error (CVE-ID: CVE-2018-1000878)

The vulnerability allows a remote attacker to cause DoS condition.

The vulnerability exists due to use-after-free error in RAR decoder - libarchive/archive_read_support_format_rar.c. A remote attacker can trick the victim into opening a specially crafted RAR archive and cause the service to crash.


3) NULL pointer dereference (CVE-ID: CVE-2018-1000879)

The vulnerability allows a remote attacker to cause DoS condition.

The vulnerability exists due to NULL Pointer Dereference vulnerability in ACL parser - libarchive/archive_acl.c, archive_acl_from_text_l(). A remote attacker can trick the victim into opening a specially crafted RAR archive and cause the service to crash.


4) Improper input validation (CVE-ID: CVE-2018-1000880)

The vulnerability allows a remote attacker to cause DoS condition.

The vulnerability exists due to insufficient validation of user-supplied input in WARC parser - libarchive/archive_read_support_format_warc.c, _warc_read() that can result in DoS - quasi-infinite run time and disk usage from tiny file. A remote attacker can trick the victim into opening a specially crafted RAR archive and cause the service to crash.


Remediation

Install update from vendor's website.

References