Multiple vulnerabilities in FreeRDP

1) Out-of-bounds write

EUVDB-ID: #VU27988

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11521

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in "libfreerdp/codec/planar.c". A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.

Note: This vulnerability affects versions greater than 1.0

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: 2.0.0 rc4

External links

http://github.com/FreeRDP/FreeRDP/commits/master
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5cwc-6wc9-255w
http://pub.freerdp.com/cve/CVE-2020-11521/pocAnalysis_6.pdf

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) Out-of-bounds read

EUVDB-ID: #VU27987

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11522

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in "libfreerdp/gdi/gdi.c". A remote attacker can trigger out-of-bounds read error and read contents of memory on the system or cause a denial of service condition.

Note: This vulnerability afffects versions greater than 1.0

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: 2.0.0 rc4

External links

http://github.com/FreeRDP/FreeRDP/commits/master
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-48wx-7vgj-fffh
http://pub.freerdp.com/cve/CVE-2020-11522/pocAnalysis_5.pdf

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) Out-of-bounds write

EUVDB-ID: #VU27986

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11524

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in "libfreerdp/codec/interleaved.c". A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.

Note: This vulnerability affects versions greater than 1.0

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: 2.0.0 rc4

External links

http://github.com/FreeRDP/FreeRDP/commits/master
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cgw8-3mp2-p5qw
http://pub.freerdp.com/cve/CVE-2020-11524/pocAnalysis_3.pdf

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) Integer overflow

EUVDB-ID: #VU27985

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11523

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow in "libfreerdp/gdi/region.c". A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

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

Note: This vulnerability affects versions greater than 1.0

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: 2.0.0 rc4

External links

http://github.com/FreeRDP/FreeRDP/commits/master
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4qrh-8cp8-4x42
http://pub.freerdp.com/cve/CVE-2020-11523/pocAnalysis_2.pdf

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) Out-of-bounds read

EUVDB-ID: #VU27982

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11525

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in "libfreerdp/cache/bitmap.c". A remote attacker can trigger out-of-bounds read error and read contents of memory on the system.

Note: This vulnerability affects versions greater than 1.0

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: 2.0.0 rc4

External links

http://github.com/FreeRDP/FreeRDP/commits/master
http://github.com/FreeRDP/FreeRDP/pull/6019/commits/58dc36b3c883fd460199cedb6d30e58eba58298c
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9755-fphh-gmjg
http://pub.freerdp.com/cve/CVE-2020-11525/pocAnalysis_1.pdf

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) Out-of-bounds read

EUVDB-ID: #VU27980

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11045

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in "update_read_bitmap_data". A remote attacker can trigger out-of-bounds read error and read contents of memory on the system.

Note: This vulnerability affects versions after 1.0

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: before 2.0.0

External links

http://github.com/FreeRDP/FreeRDP/commit/f8890a645c221823ac133dbf991f8a65ae50d637
http://github.com/FreeRDP/FreeRDP/issues/6005
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3x39-248q-f4q6

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) Out-of-bounds read

EUVDB-ID: #VU27978

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11046

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in "update_read_synchronize". A remote attacker can trigger out-of-bounds read error and cause a denial of service condition on the target system.

Note: This vulnerability affects versions after 1.0

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: before 2.0.0

External links

http://github.com/FreeRDP/FreeRDP/commit/ed53cd148f43cbab905eaa0f5308c2bf3c48cc37
http://github.com/FreeRDP/FreeRDP/issues/6006
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hx48-wmmm-mr5q

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) Out-of-bounds read

EUVDB-ID: #VU27977

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11048

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in "rdp_read_flow_control_pdu". A remote authenticated attacker can trigger out-of-bounds read error and cause a denial of service condition on the target system.

Note: This vulnerability affects versions after 1.0

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: before 2.0.0

External links

http://github.com/FreeRDP/FreeRDP/commit/9301bfe730c66180263248b74353daa99f5a969b
http://github.com/FreeRDP/FreeRDP/issues/6007
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hv8w-f2hx-5gcv

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

9) Out-of-bounds read

EUVDB-ID: #VU27976

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11049

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in "rdp_read_share_control_header". A remote attacker can trigger out-of-bounds read error and read contents of memory on the system or cause a denial of service condition.

Note: This vulnerability afffects versions greater than 1.1

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: before 2.0.0

External links

http://github.com/FreeRDP/FreeRDP/commit/c367f65d42e0d2e1ca248998175180aa9c2eacd0
http://github.com/FreeRDP/FreeRDP/issues/6008
http://github.com/FreeRDP/FreeRDP/pull/6019
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-wwh7-r2r8-xjpr

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) Out-of-bounds read

EUVDB-ID: #VU27975

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11047

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in "autodetect_recv_bandwidth_measure_results". A remote attacker can trigger out-of-bounds read error and read contents of memory on the system.

Note: This vulnerability affects versions greater than 1.1

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: before 2.0.0

External links

http://github.com/FreeRDP/FreeRDP/commit/f5e73cc7c9cd973b516a618da877c87b80950b65
http://github.com/FreeRDP/FreeRDP/issues/6009
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9fw6-m2q8-h5pw

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) Out-of-bounds read

EUVDB-ID: #VU27974

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11042

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in "update_read_icon_info". A remote attacker can trigger out-of-bounds read error and read contents of memory on the system or cause a denial of service condition.

Note: This vulnerability afffects versions greater than 1.1

Mitigation

Install update from vendor's website.

Vulnerable software versions

FreeRDP: before 2.0.0

External links

http://github.com/FreeRDP/FreeRDP/commit/6b2bc41935e53b0034fe5948aeeab4f32e80f30f
http://github.com/FreeRDP/FreeRDP/issues/6010
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9jp6-5vf2-cx2q

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) Out-of-bounds read

EUVDB-ID: #VU27973

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11058

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in "rdp_read_font_capability_set". A remote authenticated attacker can trigger out-of-bounds read error and cause a denial of service condition on the target system.

Note: This vulnerability affects versions after 1.1

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: before 2.0.0

External links

http://github.com/FreeRDP/FreeRDP/commit/3627aaf7d289315b614a584afb388f04abfb5bbf
http://github.com/FreeRDP/FreeRDP/issues/6011
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-wjg2-2f82-466g

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

13) Out-of-bounds read

EUVDB-ID: #VU27971

Risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-11526

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack

The vulnerability exists due to a boundary condition in "update_recv_secondary_order" function in the "libfreerdp/core/update.c" file. A remote attacker can trigger out-of-bounds read error and cause a denial of service condition on the target system.

Note: This vulnerability affects verions greater than 1.1

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: 2.0.0 rc4

External links

http://github.com/FreeRDP/FreeRDP/commits/master
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-97jw-m5w5-xvf9
http://pub.freerdp.com/cve/CVE-2020-11526/pocAnalysis_4.pdf

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. However, proof of concept for this vulnerability is available.

14) Double Free

EUVDB-ID: #VU27970

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11044

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in "update_read_cache_bitmap_v3_order". A remote attacker can pass specially crafted data to the application, trigger double free error and cause a denal of service condition on the target system.

Note: This vulnerability affects versions greater than 1.2

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRDP: before 2.0.0

External links

http://github.com/FreeRDP/FreeRDP/commit/67c2aa52b2ae0341d469071d1bc8aab91f8d2ed8
http://github.com/FreeRDP/FreeRDP/issues/6013
http://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cgqh-p732-6x2w

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.

Risk	High
Patch available	YES
Number of vulnerabilities	14
CVE-ID	CVE-2020-11521 CVE-2020-11522 CVE-2020-11524 CVE-2020-11523 CVE-2020-11525 CVE-2020-11045 CVE-2020-11046 CVE-2020-11048 CVE-2020-11049 CVE-2020-11047 CVE-2020-11042 CVE-2020-11058 CVE-2020-11526 CVE-2020-11044
CWE-ID	CWE-787 CWE-125 CWE-190 CWE-415
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #13 is available.
Vulnerable software Subscribe	FreeRDP Universal components / Libraries / Libraries used by multiple products
Vendor	FreeRDP