Description
The backtrack compilation code in the Irregex package (aka IrRegular Expressions) before 0.9.6 for Scheme allows remote attackers to cause a denial of service (memory consumption) via a crafted regular expression with a repeating pattern.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | chicken | 4.12.0-0.2 | — |
| Debian 13 | chicken | 4.12.0-0.2 | — |
| Debian 12 | chicken | 4.12.0-0.2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | chicken | No fix yet | — |
References
- [oss-security] 20161215 Re: CVE Request: IrRegular Expressions resource exhaustion in regex compilation [was: Re: CVE Request: resource exhaustion in regex expression handling in WebKit] mailing-list
- https://github.com/ashinn/irregex/commit/a16ffc86eca15fca9e40607d41de3cea9cf868f1
- 94942 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1413990