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CVE-2023-42456

26
FAUCET Score

CVE-2023-42456 affects sudo-rs versions prior to 0.2.1, allowing path traversal due to improper handling of usernames containing '.' or '/' characters when constructing session file paths. An authenticated attacker with the ability to create users with specially crafted usernames could exploit this to delete arbitrary files, such as system binaries, by using the 'sudo -K' command. Rated 8.1 HIGH (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H), this vulnerability has a high impact on integrity and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.2.1CPE matchmatch criteria
cpe:2.3:a:memorysafety:sudo:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

3.3LOW

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
0.8
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
43.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 34th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rustpatch availablevia ghsa
Product: sudo-rsFixed in: 0.2.1

Vendor Advisories (1)

rustGHSA-2r3c-m6v7-9354low

sudo-rs Session File Relative Path Traversal vulnerability

Sep 21, 2023

References

ferrous-systems.com / blog/sudo-rs-audit
github.com / memorysafety/sudo-rs/security/advisories/GHSA-2r3c-m6v7-9354
Vendor Advisory
openwall.com / lists/oss-security/2023/11/02/1
github.com / memorysafety/sudo-rs/commit/bfdbda22968e3de43fa8246cab1681cfd5d5493d
Patch
github.com / trifectatechfoundation/sudo-rs/security/advisories/GHSA-2r3c-m6v7-9354