Gentoo update for ncurses



Published: 2018-04-17
Risk High
Patch available YES
Number of vulnerabilities 12
CVE-ID CVE-2017-10684
CVE-2017-10685
CVE-2017-11112
CVE-2017-11113
CVE-2017-13728
CVE-2017-13729
CVE-2017-13730
CVE-2017-13731
CVE-2017-13732
CVE-2017-13733
CVE-2017-13734
CVE-2017-16879
CWE-ID CWE-121
CWE-134
CWE-20
CWE-476
CWE-835
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Operating systems & Components / Operating system

Vendor Gentoo

Security Bulletin

This security bulletin contains information about 12 vulnerabilities.

1) Stack-based buffer overflow

EUVDB-ID: #VU12110

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-10684

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists in the fmt_entry function of ncurses due to stack-based buffer overflow when handling malicious input. A remote unauthenticated attacker can send a request that submits malicious input, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

2) Use of externally-controlled format string

EUVDB-ID: #VU12190

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-10685

CWE-ID: CWE-134 - Use of Externally-Controlled Format String

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists in the fmt_entry function due to use of externally-controlled format string. A remote attacker can submit a specially crafted input and execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

3) Improper input validation

EUVDB-ID: #VU12191

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-11112

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the append_acs function of tinfo/parse_entry.c due to an attempted 0xffffffffffffffff access. A remote attacker can cause the service to crash if the terminfo library code is used to process untrusted terminfo data.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

4) NULL pointer dereference

EUVDB-ID: #VU12193

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-11113

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the _nc_parse_entry function of tinfo/parse_entry.c due to NULL pointer dereference. A remote attacker can cause the service to crash if the terminfo library code is used to process untrusted terminfo data.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

5) Infinite loop

EUVDB-ID: #VU12195

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-13728

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause Dos condition on the target system.

The weakness exists in the next_char function in comp_scan.c due to an infinite loop. A remote attacker can submit a specially crafted input and cause the service to crash.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

6) Improper input validation

EUVDB-ID: #VU12196

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-13729

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the _nc_save_str function in alloc_entry.c due to an illegal address access. A remote attacker can cause the service to crash.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

7) Improper input validation

EUVDB-ID: #VU12197

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-13730

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the function _nc_read_entry_source() in progs/tic.c due to an illegal address access. A remote attacker can cause the service to crash.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

8) Improper input validation

EUVDB-ID: #VU12198

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-13731

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the function postprocess_termcap() in parse_entry.c due to an illegal address access. A remote attacker can cause the service to crash.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

9) Improper input validation

EUVDB-ID: #VU12199

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-13732

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the function dump_uses() in progs/dump_entry.c due to an illegal address access. A remote attacker can cause the service to crash.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

10) Improper input validation

EUVDB-ID: #VU12200

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-13733

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the fmt_entry function in progs/dump_entry.c  due to an illegal address access. A remote attacker can cause the service to crash.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

11) Improper input validation

EUVDB-ID: #VU12201

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-13734

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the _nc_safe_strcat function in strings.c due to an illegal address access. A remote attacker can cause the service to crash.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

12) Stack-based buffer overflow

EUVDB-ID: #VU12202

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-16879

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists in the _nc_write_entry function in tinfo/write_entry.c due to stac-based buffer overflow. A remote attacker can submit a specially crafted terminfo file, as demonstrated by tic, trick the victim into opening it, trigger memory corruption and cause the service to crash or execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update the affected packages.
sys-libs/ncurses to version: 6.1

Vulnerable software versions

Gentoo Linux: All versions

External links

http://security.gentoo.org/glsa/201804-13


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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



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