Vulnerability in Pomsky-Lang Pomsky
CVE-2022-31100
rulex is a new, portable, regular expression language. When parsing untrusted rulex expressions, rulex may crash, possibly enabling a Denial of Service attack. This happens when the expression contains a multi-byte UTF-8 code point in a string literal or after a backslash, because rulex tries to slice into the code point and panics as a result. This is a security concern for you, if your service parses untrusted rulex expressions (expressions provided by an untrusted user), and your service becomes unavailable when the thread running rulex panics. The crashes are fixed in version **0.4.3**. Affected users are advised to update to this version. The only known workaround for this issue is to assume that regular expression parsing will panic and to add logic to catch panics.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.009 (56.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.000
Affected products
- Pomsky-Lang Pomsky
- Rulex-Rs Rulex — versions < 0.4.3
Weakness classification (CWE)
References
- github.com/rulex-rs/rulex/security/advisories/GHSA-8v9w-p43c-r885 (Third Party Advisory, Mitigation)
- github.com/rulex-rs/rulex/commit/fac6d58b25c6f9f8c0a6cdc4dec75b37b219f1d6 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-31100?
- CVE-2022-31100 is a medium-severity vulnerability in Pomsky-Lang Pomsky, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2022-06-27.
- How severe is CVE-2022-31100?
- Medium severity. CVSS v3 base score is 6.5 out of 10.