CVE-2020-9759
webOS TV Emulator privilege escalation vulnerability
CVE-2020-9759 is a medium vulnerability (CVSS 4.6) in Lg Webos, published March 23, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.47%, the 40th percentile. Fixed in weechat 2.7.1-1.
A Vulnerability of LG Electronic web OS TV Emulator could allow an attacker to escalate privileges and overwrite certain files. This vulnerability is due to wrong environment setting. An attacker could exploit this vulnerability through crafted configuration files and executable files.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
4.6
webOS TV Emulator privilege escalation vulnerability
A Vulnerability of LG Electronic web OS TV Emulator could allow an attacker to escalate privileges and overwrite certain files. This vulnerability is due to wrong environment setting. An attacker could exploit this vulnerability through crafted configuration files and executable files.
- Record
CVE-2020-9759- CVSS 3.1
- 4.6 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
EUVDEUVD-2020-30538
4.6
A Vulnerability of LG Electronic web OS TV Emulator could allow an attacker to escalate privileges and overwrite certain files. This vulnerability is due to wrong environment setting. An attacker could exploit this vulnerability through crafted configuration files and executable files.
- Record
EUVD-2020-30538- CVSS 3.1
- 4.6 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-j24f-gw9v-x4vp
7.8
An issue was discovered in WeeChat before 2.7.1 (0.4.0 to 2.7 are affected). A malformed message...
An issue was discovered in WeeChat before 2.7.1 (0.4.0 to 2.7 are affected). A malformed message 352 (who) can cause a NULL pointer dereference in the callback function, resulting in a crash.
- Record
GHSA-j24f-gw9v-x4vp- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-476, CWE-494
- Updated
- 2026-11-02
NVD
4.6
A Vulnerability of LG Electronic web OS TV Emulator could allow an attacker to escalate privileges and overwrite certain files. This vulnerability is due to wrong environment setting. An attacker could exploit this vulnerability through crafted configuration files and executable files.
- Record
CVE-2020-9759- CVSS 3.1
- 4.6 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 9.3 High
AV:N/AC:M/Au:N/C:C/I:C/A:C - Weakness
- CWE-494
- Updated
- 2026-11-02
OSV
7.8
A Vulnerability of LG Electronic web OS TV Emulator could allow an attacker to escalate privileges and overwrite certain files. This vulnerability is due to wrong environment setting. An attacker could exploit this vulnerability through crafted configuration files and executable files.
- Record
CVE-2020-9759- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-9759
7.8
A Vulnerability of LG Electronic web OS TV Emulator could allow an attacker to escalate privileges and overwrite certain files. This vulnerability is due to wrong environment setting. An attacker could exploit this vulnerability through crafted configuration files and executable files.
- Record
DEBIAN-CVE-2020-9759- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-9759
7.8
A Vulnerability of LG Electronic web OS TV Emulator could allow an attacker to escalate privileges and overwrite certain files. This vulnerability is due to wrong environment setting. An attacker could exploit this vulnerability through crafted configuration files and executable files.
- Record
UBUNTU-CVE-2020-9759- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 3.1
- 4.6 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVMGASA-2020-0153 No score
Updated weechat packages fix security vulnerabilities
Updated weechat packages fix security vulnerabilities:
An issue was discovered in WeeChat before 2.7.1 (0.4.0 to 2.7 are affected). A malformed message 352 (who) can cause a NULL pointer dereference in the callback function, resulting in a crash (CVE-2020-9759).
An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC message 005 is received with longer nick prefixes, a buffer overflow and possibly a crash can happen when a new mode is set for a nick (CVE-2020-9760).
- Record
MGASA-2020-0153- Updated
- 2026-11-02
OSVUSN-5258-1 No score
weechat vulnerabilities
Stuart Nevans Locke discovered that WeeChat's relay plugin insecurely handled malformed websocket frames. A remote attacker in control of a server could possibly use this issue to cause denial of service in a client. (CVE-2021-40516)
Stuart Nevans Locke discovered that WeeChat insecurely handled certain IRC messages. A remote attacker in control of a server could possibly use this issue to cause denial of service in a client. This issue only affected Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2020-9760)
Stuart Nevans Locke discovered that WeeChat insecurely handled certain IRC messages. A remote unauthenticated attacker could possibly use these issues to cause denial of service in a client. These issues only affected Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2020-9759, CVE-2020-8955)
Joseph Bisch discovered that WeeChat's logger incorrectly handled certain memory operations when handling log file names. A remote attacker could possibly use this issue to cause denial of service in a client. This issue only affected Ubuntu 16.04 ESM. (CVE-2017-14727)
- Record
USN-5258-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
weechatDebian:12 |
before 2.7.1-1 | 2.7.1-1 |
weechatDebian:13 |
before 2.7.1-1 | 2.7.1-1 |
weechatDebian:14 |
before 2.7.1-1 | 2.7.1-1 |
weechatDebian:8 |
before 1.0.1-1+deb8u3, plus listed versions 1.0.1-11.0.1-1+deb8u11.0.1-1+deb8u1~bpo70+11.0.1-1+deb8u2 |
1.0.1-1+deb8u3 |
weechatDebian:9 |
before 1.6-1+deb9u3, plus listed versions 1.6-1+deb9u11.6-1+deb9u2 |
1.6-1+deb9u3 |
weechatMageia:7 |
before 2.7.1-1.mga7 | 2.7.1-1.mga7 |
weechatUbuntu:Pro:16.04:LTS |
before 1.4-2ubuntu0.1+esm1, plus listed versions 1.3-11.3-1build11.4-11.4-1build11.4-1build21.4-21.4-2ubuntu0.1 |
1.4-2ubuntu0.1+esm1 |
weechatUbuntu:Pro:18.04:LTS |
before 1.9.1-1ubuntu1+esm1, plus listed versions 1.9.1-11.9.1-1build11.9.1-1ubuntu1 |
1.9.1-1ubuntu1+esm1 |
weechatUbuntu:Pro:20.04:LTS |
before 2.8-1ubuntu0.1~esm1, plus listed versions 2.6-22.6-2build12.6-2build22.6-2ubuntu12.6-2ubuntu22.8-1 |
2.8-1ubuntu0.1~esm1 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases, published | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
blog.recurity-labs.com/2021-02-03/webOS_Pt1.html
lists.debian.org/debian-lts-announce/2021/09/msg00018.html
nvd.nist.gov/vuln/detail/CVE-2020-9759
github.com/weechat/weechat/commit/9904cb6d2eb40f679d8ff6557c22d53a3e3dc75a
lists.debian.org/debian-lts-announce/2020/03/msg00031.html
security.gentoo.org/glsa/202003-51
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weechat.org/doc/security
github.com/advisories/GHSA-j24f-gw9v-x4vp
security-tracker.debian.org/tracker/CVE-2020-9759
advisories.mageia.org/MGASA-2020-0153.html
bugs.mageia.org/show_bug.cgi?id=26400
debian.org/lts/security/2020/dla-2157
ubuntu.com/security/CVE-2020-9759
ubuntu.com/security/notices/USN-5258-1
cve.org/CVERecord?id=CVE-2020-9759
ubuntu.com/security/CVE-2017-14727
ubuntu.com/security/CVE-2020-8955
ubuntu.com/security/CVE-2020-9760
ubuntu.com/security/CVE-2021-40516