CVE-2019-19203

NameCVE-2019-19203
DescriptionAn issue was discovered in Oniguruma 6.x before 6.9.4_rc2. In the function gb18030_mbc_enc_len in file gb18030.c, a UChar pointer is dereferenced without checking if it passed the end of the matched string. This leads to a heap-based buffer over-read.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severityhigh
Debian Bugs945312

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libonig (PTS)jessie5.9.5-3.2+deb8u1vulnerable
jessie (security)5.9.5-3.2+deb8u4vulnerable
stretch6.1.3-2vulnerable
buster6.9.1-1vulnerable
bullseye, sid6.9.2-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libonigsource(unstable)(unfixed)low945312

Notes

[buster] - libonig <no-dsa> (Minor issue)
[stretch] - libonig <no-dsa> (Minor issue)
[jessie] - libonig <ignored> (Minor issue, not reproducible, non-trivial backport)
https://github.com/kkos/oniguruma/issues/163
https://github.com/kkos/oniguruma/commit/aa0188eaedc056dca8374ac03d0177429b495515 (v6.9.4_rc2)
Only exploitable with attacker-provided pattern

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