sigstore gitsign 0.6.x/0.7.x Rekor API signature verification
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
3.8 | $0-$5k | 0.00 |
A vulnerability has been found in sigstore gitsign 0.6.x/0.7.x and classified as problematic. Affected by this vulnerability is an unknown part of the component Rekor API. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect integrity. The summary by CVE is:
Gitsign is software for keyless Git signing using Sigstore. In versions of gitsign starting with 0.6.0 and prior to 0.8.0, Rekor public keys were fetched via the Rekor API, instead of through the local TUF client. If the upstream Rekor server happened to be compromised, gitsign clients could potentially be tricked into trusting incorrect signatures. There is no known compromise the default public good instance (`rekor.sigstore.dev`) - anyone using this instance is unaffected. This issue was fixed in v0.8.0. No known workarounds are available.
The weakness was published 11/11/2023 as GHSA-xvrc-2wvh-49vc. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-47122 since 10/30/2023. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.
Upgrading to version 0.8.0 eliminates this vulnerability. Applying the patch cd66ccb03c86a3600955f0c15f6bfeb75f697236 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.
Product
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 3.8VulDB Meta Temp Score: 3.8
VulDB Base Score: 2.0
VulDB Temp Score: 1.9
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 5.3
NVD Vector: 🔍
CNA Base Score: 4.2
CNA Vector (GitHub, Inc.): 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
Exploiting
Class: Signature verificationCWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: gitsign 0.8.0
Patch: cd66ccb03c86a3600955f0c15f6bfeb75f697236
Timeline
10/30/2023 🔍11/11/2023 🔍
11/11/2023 🔍
12/06/2023 🔍
Sources
Advisory: GHSA-xvrc-2wvh-49vcStatus: Confirmed
CVE: CVE-2023-47122 (🔍)
Entry
Created: 11/11/2023 01:23 AMUpdated: 12/06/2023 10:34 AM
Changes: 11/11/2023 01:23 AM (52), 12/06/2023 10:34 AM (11)
Complete: 🔍
Cache ID: 18:306:40
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