Denial of service in libarchive



| Updated: 2018-12-27
Risk Low
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2018-1000877
CVE-2018-1000878
CVE-2018-1000879
CVE-2018-1000880
CWE-ID CWE-415
CWE-416
CWE-476
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 libarchive
Client/Desktop applications / Software for archiving

Vendor libarchive

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Double-free error

EUVDB-ID: #VU16726

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1000877

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libarchive: 3.1.0 - 3.3.3

CPE2.3 External links

https://github.com/libarchive/libarchive/pull/1105
https://github.com/libarchive/libarchive/pull/1105/commits/021efa522ad729ff0f5806c4ce53e4a6cc1daa31


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted archive.

Is there known malware, which exploits this vulnerability?

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

2) Use-after-free error

EUVDB-ID: #VU16727

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1000878

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libarchive: 3.1.0 - 3.3.3

CPE2.3 External links

https://github.com/libarchive/libarchive/pull/1105
https://github.com/libarchive/libarchive/pull/1105/commits/bfcfe6f04ed20db2504db8a254d1f40a1d84eb28


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted archive.

Is there known malware, which exploits this vulnerability?

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

3) NULL pointer dereference

EUVDB-ID: #VU16728

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1000879

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libarchive: 3.1.0 - 3.3.3

CPE2.3 External links

https://github.com/libarchive/libarchive/pull/1105
https://github.com/libarchive/libarchive/pull/1105/commits/15bf44fd2c1ad0e3fd87048b3fcc90c4dcff1175


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted archive.

Is there known malware, which exploits this vulnerability?

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

4) Improper input validation

EUVDB-ID: #VU16729

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1000880

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libarchive: 3.1.0 - 3.3.3

CPE2.3 External links

https://github.com/libarchive/libarchive/pull/1105
https://github.com/libarchive/libarchive/pull/1105/commits/15bf44fd2c1ad0e3fd87048b3fcc90c4dcff1175


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted archive.

Is there known malware, which exploits this vulnerability?

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



###SIDEBAR###