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CVE-2020-11017

Double free in cliprdr_server_receive_capabilities in FreeRDP

6.5 MediumFix available

In FreeRDP less than or equal to 2.0.0, by providing manipulated input a malicious client can create a double free condition and crash the server. This is fixed in version 2.1.0.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.65%Up 1.0 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 6.5

Double free in cliprdr_server_receive_capabilities in FreeRDP

In FreeRDP less than or equal to 2.0.0, by providing manipulated input a malicious client can create a double free condition and crash the server. This is fixed in version 2.1.0.

Record
CVE-2020-11017
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-415
Updated
2026-11-02
EUVDEUVD-2020-3406 6.5

In FreeRDP less than or equal to 2.0.0, by providing manipulated input a malicious client can create a double free condition and crash the server. This is fixed in version 2.1.0.

Record
EUVD-2020-3406
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
NVD 6.5

In FreeRDP less than or equal to 2.0.0, by providing manipulated input a malicious client can create a double free condition and crash the server. This is fixed in version 2.1.0.

Record
CVE-2020-11017
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
4.0 MediumAV:N/AC:L/Au:S/C:N/I:N/A:P
Weakness
CWE-415
Updated
2026-11-02
OSV 6.5

In FreeRDP less than or equal to 2.0.0, by providing manipulated input a malicious client can create a double free condition and crash the server. This is fixed in version 2.1.0.

Record
CVE-2020-11017
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-11017 6.5

In FreeRDP less than or equal to 2.0.0, by providing manipulated input a malicious client can create a double free condition and crash the server. This is fixed in version 2.1.0.

Record
DEBIAN-CVE-2020-11017
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2020-11017 6.5

In FreeRDP less than or equal to 2.0.0, by providing manipulated input a malicious client can create a double free condition and crash the server. This is fixed in version 2.1.0.

Record
UBUNTU-CVE-2020-11017
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 6 moreShow less
OSVMGASA-2020-0297 No score

Updated freerdp/remmina packages fix security vulnerability

It was discovered that FreeRDP incorrectly handled certain memory operations. A remote attacker could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly exeucte arbitrary code.

The freerdp package has been updated to version 2.1.2 to fix these issues.

Also, the remmina package has been updated to version 1.4.7 for compatibility with the updated freerdp.

Record
MGASA-2020-0297
Updated
2026-11-02
OSVopenSUSE-SU-2020:1090-1 No score

Security update for freerdp

This update for freerdp fixes the following issues:

frerdp was updated to version 2.1.2 (bsc#1171441,bsc#1173247 and jsc#ECO-2006):

  • CVE-2020-11017: Fixed a double free which could have denied the server's service.
  • CVE-2020-11018: Fixed an out of bounds read which a malicious clients could have triggered.
  • CVE-2020-11019: Fixed an issue which could have led to denial of service if logger was set to 'WLOG_TRACE'.
  • CVE-2020-11038: Fixed a buffer overflow when /video redirection was used.
  • CVE-2020-11039: Fixed an issue which could have allowed arbitrary memory read and write when USB redirection was enabled.
  • CVE-2020-11040: Fixed an out of bounds data read in clear_decompress_subcode_rlex.
  • CVE-2020-11041: Fixed an issue with the configuration for sound backend which could have led to server's denial of service.
  • CVE-2020-11043: Fixed an out of bounds read in rfx_process_message_tileset.
  • CVE-2020-11085: Fixed an out of bounds read in cliprdr_read_format_list.
  • CVE-2020-11086: Fixed an out of bounds read in ntlm_read_ntlm_v2_client_challenge.
  • CVE-2020-11087: Fixed an out of bounds read in ntlm_read_AuthenticateMessage.
  • CVE-2020-11088: Fixed an out of bounds read in ntlm_read_NegotiateMessage.
  • CVE-2020-11089: Fixed an out of bounds read in irp function family.
  • CVE-2020-11095: Fixed a global out of bounds read in update_recv_primary_order.
  • CVE-2020-11096: Fixed a global out of bounds read in update_read_cache_bitmap_v3_order.
  • CVE-2020-11097: Fixed an out of bounds read in ntlm_av_pair_get.
  • CVE-2020-11098: Fixed an out of bounds read in glyph_cache_put.
  • CVE-2020-11099: Fixed an out of bounds Read in license_read_new_or_upgrade_license_packet.
  • CVE-2020-11521: Fixed an out of bounds write in planar.c (bsc#1171443).
  • CVE-2020-11522: Fixed an out of bounds read in gdi.c (bsc#1171444).
  • CVE-2020-11523: Fixed an integer overflow in region.c (bsc#1171445).
  • CVE-2020-11524: Fixed an out of bounds write in interleaved.c (bsc#1171446).
  • CVE-2020-11525: Fixed an out of bounds read in bitmap.c (bsc#1171447).
  • CVE-2020-11526: Fixed an out of bounds read in update_recv_secondary_order (bsc#1171674).
  • CVE-2020-13396: Fixed an Read in ntlm_read_ChallengeMessage.
  • CVE-2020-13397: Fixed an out of bounds read in security_fips_decrypt due to uninitialized value.
  • CVE-2020-13398: Fixed an out of bounds write in crypto_rsa_common.
  • CVE-2020-4030: Fixed an out of bounds read in TrioParse.
  • CVE-2020-4031: Fixed a use after free in gdi_SelectObject.
  • CVE-2020-4032: Fixed an integer casting in update_recv_secondary_order.
  • CVE-2020-4033: Fixed an out of bound read in RLEDECOMPRESS.
  • Fixed an issue where freerdp failed with -fno-common (bsc#1169748).
  • Fixed an issue where USB redirection with FreeRDP was not working (bsc#1169679).

This update was imported from the SUSE:SLE-15-SP1:Update update project.

Record
openSUSE-SU-2020:1090-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:10768-1 No score

freerdp-2.4.0-2.1 on GA media

These are all security issues fixed in the freerdp-2.4.0-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10768-1
Updated
2026-11-02
OSVSUSE-SU-2020:2032-1 No score

Security update for freerdp

This update for freerdp fixes the following issues:

frerdp was updated to version 2.1.2 (bsc#1171441,bsc#1173247 and jsc#ECO-2006):

  • CVE-2020-11017: Fixed a double free which could have denied the server's service.
  • CVE-2020-11018: Fixed an out of bounds read which a malicious clients could have triggered.
  • CVE-2020-11019: Fixed an issue which could have led to denial of service if logger was set to 'WLOG_TRACE'.
  • CVE-2020-11038: Fixed a buffer overflow when /video redirection was used.
  • CVE-2020-11039: Fixed an issue which could have allowed arbitrary memory read and write when USB redirection was enabled.
  • CVE-2020-11040: Fixed an out of bounds data read in clear_decompress_subcode_rlex.
  • CVE-2020-11041: Fixed an issue with the configuration for sound backend which could have led to server's denial of service.
  • CVE-2020-11043: Fixed an out of bounds read in rfx_process_message_tileset.
  • CVE-2020-11085: Fixed an out of bounds read in cliprdr_read_format_list.
  • CVE-2020-11086: Fixed an out of bounds read in ntlm_read_ntlm_v2_client_challenge.
  • CVE-2020-11087: Fixed an out of bounds read in ntlm_read_AuthenticateMessage.
  • CVE-2020-11088: Fixed an out of bounds read in ntlm_read_NegotiateMessage.
  • CVE-2020-11089: Fixed an out of bounds read in irp function family.
  • CVE-2020-11095: Fixed a global out of bounds read in update_recv_primary_order.
  • CVE-2020-11096: Fixed a global out of bounds read in update_read_cache_bitmap_v3_order.
  • CVE-2020-11097: Fixed an out of bounds read in ntlm_av_pair_get.
  • CVE-2020-11098: Fixed an out of bounds read in glyph_cache_put.
  • CVE-2020-11099: Fixed an out of bounds Read in license_read_new_or_upgrade_license_packet.
  • CVE-2020-11521: Fixed an out of bounds write in planar.c (bsc#1171443).
  • CVE-2020-11522: Fixed an out of bounds read in gdi.c (bsc#1171444).
  • CVE-2020-11523: Fixed an integer overflow in region.c (bsc#1171445).
  • CVE-2020-11524: Fixed an out of bounds write in interleaved.c (bsc#1171446).
  • CVE-2020-11525: Fixed an out of bounds read in bitmap.c (bsc#1171447).
  • CVE-2020-11526: Fixed an out of bounds read in update_recv_secondary_order (bsc#1171674).
  • CVE-2020-13396: Fixed an Read in ntlm_read_ChallengeMessage.
  • CVE-2020-13397: Fixed an out of bounds read in security_fips_decrypt due to uninitialized value.
  • CVE-2020-13398: Fixed an out of bounds write in crypto_rsa_common.
  • CVE-2020-4030: Fixed an out of bounds read in TrioParse.
  • CVE-2020-4031: Fixed a use after free in gdi_SelectObject.
  • CVE-2020-4032: Fixed an integer casting in update_recv_secondary_order.
  • CVE-2020-4033: Fixed an out of bound read in RLEDECOMPRESS.
  • Fixed an issue where freerdp failed with -fno-common (bsc#1169748).
  • Fixed an issue where USB redirection with FreeRDP was not working (bsc#1169679).
Record
SUSE-SU-2020:2032-1
Updated
2026-11-02
OSVSUSE-SU-2020:2068-1 No score

Security update for freerdp

This update for freerdp fixes the following issues:

frerdp was updated to version 2.1.2 (bsc#1171441,bsc#1173247 and jsc#ECO-2006):

  • CVE-2020-11017: Fixed a double free which could have denied the server's service.
  • CVE-2020-11018: Fixed an out of bounds read which a malicious clients could have triggered.
  • CVE-2020-11019: Fixed an issue which could have led to denial of service if logger was set to 'WLOG_TRACE'.
  • CVE-2020-11038: Fixed a buffer overflow when /video redirection was used.
  • CVE-2020-11039: Fixed an issue which could have allowed arbitrary memory read and write when USB redirection was enabled.
  • CVE-2020-11040: Fixed an out of bounds data read in clear_decompress_subcode_rlex.
  • CVE-2020-11041: Fixed an issue with the configuration for sound backend which could have led to server's denial of service.
  • CVE-2020-11043: Fixed an out of bounds read in rfx_process_message_tileset.
  • CVE-2020-11085: Fixed an out of bounds read in cliprdr_read_format_list.
  • CVE-2020-11086: Fixed an out of bounds read in ntlm_read_ntlm_v2_client_challenge.
  • CVE-2020-11087: Fixed an out of bounds read in ntlm_read_AuthenticateMessage.
  • CVE-2020-11088: Fixed an out of bounds read in ntlm_read_NegotiateMessage.
  • CVE-2020-11089: Fixed an out of bounds read in irp function family.
  • CVE-2020-11095: Fixed a global out of bounds read in update_recv_primary_order.
  • CVE-2020-11096: Fixed a global out of bounds read in update_read_cache_bitmap_v3_order.
  • CVE-2020-11097: Fixed an out of bounds read in ntlm_av_pair_get.
  • CVE-2020-11098: Fixed an out of bounds read in glyph_cache_put.
  • CVE-2020-11099: Fixed an out of bounds Read in license_read_new_or_upgrade_license_packet.
  • CVE-2020-11521: Fixed an out of bounds write in planar.c (bsc#1171443).
  • CVE-2020-11522: Fixed an out of bounds read in gdi.c (bsc#1171444).
  • CVE-2020-11523: Fixed an integer overflow in region.c (bsc#1171445).
  • CVE-2020-11524: Fixed an out of bounds write in interleaved.c (bsc#1171446).
  • CVE-2020-11525: Fixed an out of bounds read in bitmap.c (bsc#1171447).
  • CVE-2020-11526: Fixed an out of bounds read in update_recv_secondary_order (bsc#1171674).
  • CVE-2020-13396: Fixed an Read in ntlm_read_ChallengeMessage.
  • CVE-2020-13397: Fixed an out of bounds read in security_fips_decrypt due to uninitialized value.
  • CVE-2020-13398: Fixed an out of bounds write in crypto_rsa_common.
  • CVE-2020-4030: Fixed an out of bounds read in TrioParse.
  • CVE-2020-4031: Fixed a use after free in gdi_SelectObject.
  • CVE-2020-4032: Fixed an integer casting in update_recv_secondary_order.
  • CVE-2020-4033: Fixed an out of bound read in RLEDECOMPRESS.
  • Fixed an issue where freerdp failed with -fno-common (bsc#1169748).
  • Fixed an issue where USB redirection with FreeRDP was not working (bsc#1169679).
Record
SUSE-SU-2020:2068-1
Updated
2026-11-02
OSVSUSE-SU-2020:2272-1 No score

Security update for freerdp

This update for freerdp fixes the following issues:

freerdp was updated to version 2.1.2 (bsc#1171441,bsc#1173247 and jsc#ECO-2006):

  • CVE-2020-11017: Fixed a double free which could have denied the server's service.
  • CVE-2020-11018: Fixed an out of bounds read which a malicious clients could have triggered.
  • CVE-2020-11019: Fixed an issue which could have led to denial of service if logger was set to 'WLOG_TRACE'.
  • CVE-2020-11038: Fixed a buffer overflow when /video redirection was used.
  • CVE-2020-11039: Fixed an issue which could have allowed arbitrary memory read and write when USB redirection was enabled.
  • CVE-2020-11040: Fixed an out of bounds data read in clear_decompress_subcode_rlex.
  • CVE-2020-11041: Fixed an issue with the configuration for sound backend which could have led to server's denial of service.
  • CVE-2020-11043: Fixed an out of bounds read in rfx_process_message_tileset.
  • CVE-2020-11085: Fixed an out of bounds read in cliprdr_read_format_list.
  • CVE-2020-11086: Fixed an out of bounds read in ntlm_read_ntlm_v2_client_challenge.
  • CVE-2020-11087: Fixed an out of bounds read in ntlm_read_AuthenticateMessage.
  • CVE-2020-11088: Fixed an out of bounds read in ntlm_read_NegotiateMessage.
  • CVE-2020-11089: Fixed an out of bounds read in irp function family.
  • CVE-2020-11095: Fixed a global out of bounds read in update_recv_primary_order.
  • CVE-2020-11096: Fixed a global out of bounds read in update_read_cache_bitmap_v3_order.
  • CVE-2020-11097: Fixed an out of bounds read in ntlm_av_pair_get.
  • CVE-2020-11098: Fixed an out of bounds read in glyph_cache_put.
  • CVE-2020-11099: Fixed an out of bounds Read in license_read_new_or_upgrade_license_packet.
  • CVE-2020-11521: Fixed an out of bounds write in planar.c (bsc#1171443).
  • CVE-2020-11522: Fixed an out of bounds read in gdi.c (bsc#1171444).
  • CVE-2020-11523: Fixed an integer overflow in region.c (bsc#1171445).
  • CVE-2020-11524: Fixed an out of bounds write in interleaved.c (bsc#1171446).
  • CVE-2020-11525: Fixed an out of bounds read in bitmap.c (bsc#1171447).
  • CVE-2020-11526: Fixed an out of bounds read in update_recv_secondary_order (bsc#1171674).
  • CVE-2020-13396: Fixed an Read in ntlm_read_ChallengeMessage.
  • CVE-2020-13397: Fixed an out of bounds read in security_fips_decrypt due to uninitialized value.
  • CVE-2020-13398: Fixed an out of bounds write in crypto_rsa_common.
  • CVE-2020-4030: Fixed an out of bounds read in TrioParse.
  • CVE-2020-4031: Fixed a use after free in gdi_SelectObject.
  • CVE-2020-4032: Fixed an integer casting in update_recv_secondary_order.
  • CVE-2020-4033: Fixed an out of bound read in RLEDECOMPRESS.
  • Fixed an issue where freerdp failed with -fno-common (bsc#1169748).
  • Fixed an issue where USB redirection with FreeRDP was not working (bsc#1169679).
  • Fixed an issue where freerdp could not start (bsc#1129193).
  • Fixed an issue where copy and paste between remote host was transforming text to chinese (bsc#1004108).
  • Added pulse support (bsc#1090677).

Additionally, the following issue was fixed:

  • CVE-2020-15103: Fix integer overflow due to missing input sanitation in rdpegfx channel (bsc#1174321).
Record
SUSE-SU-2020:2272-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
freerdp2
Debian:12
 before 2.1.1+dfsg1-1
2.1.1+dfsg1-1
freerdp2
Debian:10
From an advisory covering 46 CVEs
 before 2.3.0+dfsg1-2+deb10u3, plus listed versions
2.0.0~git20190204.1.2693389a+dfsg1-12.0.0~git20190204.1.2693389a+dfsg1-1+deb10u12.0.0~git20190204.1.2693389a+dfsg1-1+deb10u22.0.0~git20190204.1.2693389a+dfsg1-22.0.0~git20190204.1.2693389a+dfsg1-2~bpo10+1
Show 8 moreShow less
2.1.1+dfsg1-12.1.2+dfsg1-12.1.2+dfsg1-22.2.0+dfsg1-12.2.0+dfsg1-1~bpo10+12.3.0+dfsg1-12.3.0+dfsg1-1~bpo10+12.3.0+dfsg1-2
2.3.0+dfsg1-2+deb10u3
freerdp
Mageia:7
From an advisory covering 39 CVEs
 before 2.1.2-1.mga7
2.1.2-1.mga7
remmina
Mageia:7
From an advisory covering 39 CVEs
 before 1.4.7-1.mga7
1.4.7-1.mga7
freerdp
SUSE:Linux Enterprise Workstation Extension 15 SP1
From an advisory covering 31 CVEs
 before 2.1.2-10.15.1
2.1.2-10.15.1
freerdp
SUSE:Linux Enterprise Workstation Extension 15 SP2
From an advisory covering 31 CVEs
 before 2.1.2-15.7.1
2.1.2-15.7.1
freerdp
SUSE:Linux Enterprise Software Development Kit 12 SP5
From an advisory covering 46 CVEs
 before 2.1.2-12.20.1
2.1.2-12.20.1
freerdp
SUSE:Linux Enterprise Workstation Extension 12 SP5
From an advisory covering 46 CVEs
 before 2.1.2-12.20.1
2.1.2-12.20.1
vinagre
SUSE:Linux Enterprise Workstation Extension 12 SP5
From an advisory covering 46 CVEs
 before 3.20.2-16.3.3
3.20.2-16.3.3
freerdp2
Ubuntu:18.04:LTS
 before 2.1.1+dfsg1-0ubuntu0.18.04.1, plus listed versions
2.0.0~git20170725.1.1648deb+dfsg1-12.0.0~git20170725.1.1648deb+dfsg1-52.0.0~git20170725.1.1648deb+dfsg1-5ubuntu12.0.0~git20170725.1.1648deb+dfsg1-5ubuntu22.0.0~git20170725.1.1648deb+dfsg1-62.0.0~git20170725.1.1648deb+dfsg1-6build12.0.0~git20170725.1.1648deb+dfsg1-72.0.0~git20170725.1.1648deb+dfsg1-7ubuntu0.1
2.1.1+dfsg1-0ubuntu0.18.04.1
freerdp2
Ubuntu:20.04:LTS
 before 2.1.1+dfsg1-0ubuntu0.20.04.1, plus listed versions
2.0.0~git20190204.1.2693389a+dfsg1-12.0.0~git20190204.1.2693389a+dfsg1-22.0.0~git20190204.1.2693389a+dfsg1-2build12.0.0~git20190204.1.2693389a+dfsg1-2build2
2.1.1+dfsg1-0ubuntu0.20.04.1
freerdp
openSUSE:Leap 15.1
From an advisory covering 31 CVEs
 before 2.1.2-lp151.5.6.1
2.1.2-lp151.5.6.1
freerdp2
openSUSE:Tumbleweed
From an advisory covering 42 CVEs
 before 2.4.0-2.1
2.4.0-2.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-11017 is a medium vulnerability (CVSS 6.5) in Freerdp, published May 29, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.65%, the 76th percentile. Fixed in freerdp2 2.1.1+dfsg1-1.

References

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