HOMEVULNERABILITIESCVE-2020-12658
CRITICAL

CVE-2020-12658

CWE-667Published: December 31, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

gssproxy (aka gss-proxy) before 0.8.3 does not unlock cond_mutex before pthread exit in gp_worker_main() in gp_workers.c. NOTE: An upstream comment states "We are already on a shutdown path when running the code in question, so a DoS there doesn't make any sense, and there has been no additional information provided us (as upstream) to indicate why this would be a problem.

NVD Source

Technical Analysis

CVE-2020-12658 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
gssproxy_project1 product(s)
gssproxy
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/gssapi/gssproxy/commit/cb761412e299ef907f22cd7c4146d50c8a792003
PATCHhttps://github.com/gssapi/gssproxy/commit/cb761412e299ef907f22cd7c4146d50c8a792003
ADVISORYhttps://github.com/gssapi/gssproxy/compare/v0.8.2...v0.8.3
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/01/msg00004.html
ADVISORYhttps://pagure.io/gssproxy/c/cb761412e299ef907f22cd7c4146d50c8a792003?branch=master
ADVISORYhttps://github.com/gssapi/gssproxy/compare/v0.8.2...v0.8.3
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/01/msg00004.html
ADVISORYhttps://pagure.io/gssproxy/c/cb761412e299ef907f22cd7c4146d50c8a792003?branch=master

All References (8)

→
https://github.com/gssapi/gssproxy/commit/cb761412e299ef907f22cd7c4146d50c8a792003Patch · Third Party Advisory
→
https://github.com/gssapi/gssproxy/compare/v0.8.2...v0.8.3Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/01/msg00004.htmlMailing List · Third Party Advisory
→
https://pagure.io/gssproxy/c/cb761412e299ef907f22cd7c4146d50c8a792003?branch=masterThird Party Advisory
→
https://github.com/gssapi/gssproxy/commit/cb761412e299ef907f22cd7c4146d50c8a792003Patch · Third Party Advisory
→
https://github.com/gssapi/gssproxy/compare/v0.8.2...v0.8.3Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/01/msg00004.htmlMailing List · Third Party Advisory
→
https://pagure.io/gssproxy/c/cb761412e299ef907f22cd7c4146d50c8a792003?branch=masterThird Party Advisory

Quick Facts

CVE IDCVE-2020-12658
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-667
CISA KEVNo
Affected2 vendor(s)
PublishedDec 31, 2020

Related CVEs (CWE-667)

CVE-2021-22530
9.9
CVE-2019-5886
9.8
CVE-2020-15674
8.8
CVE-2024-58087
8.1
CVE-2022-50518
7.8
CVE-2020-15529
7.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-12658 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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