CVE-2016-0799

NameCVE-2016-0799
DescriptionThe fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g improperly calculates string lengths, which allows remote attackers to cause a denial of service (overflow and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than CVE-2016-2842.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-3500-1
NVD severityhigh (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openssl (PTS)wheezy1.0.1e-2+deb7u20fixed
wheezy (security)1.0.1t-1+deb7u2fixed
jessie (security), jessie1.0.1t-1+deb8u6fixed
stretch1.1.0f-3fixed
buster, sid1.1.0f-5fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensslsource(unstable)1.0.2g-1high
opensslsourcejessie1.0.1k-3+deb8u4highDSA-3500-1
opensslsourcewheezy1.0.1e-2+deb7u20highDSA-3500-1

Notes

https://www.openssl.org/news/secadv/20160301.txt
Fixed in master in https://git.openssl.org/?p=openssl.git;a=commit;h=a801bf263849a2ef773e5bc0c86438cbba720835
https://guidovranken.wordpress.com/2016/02/27/openssl-cve-2016-0799-heap-corruption-via-bio_printf/

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