CVE-2021-23840

NameCVE-2021-23840
DescriptionCalls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).
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)
ReferencesDLA-2563-1, DLA-2565-1, DSA-4855-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openssl (PTS)stretch1.1.0l-1~deb9u1vulnerable
stretch (security)1.1.0l-1~deb9u6fixed
buster1.1.1n-0+deb10u1fixed
buster (security)1.1.1n-0+deb10u2fixed
bullseye1.1.1n-0+deb11u1fixed
bullseye (security)1.1.1n-0+deb11u2fixed
bookworm3.0.3-8fixed
sid3.0.4-1fixed
openssl1.0 (PTS)stretch1.0.2u-1~deb9u1vulnerable
stretch (security)1.0.2u-1~deb9u7fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensslsourcestretch1.1.0l-1~deb9u3DLA-2563-1
opensslsourcebuster1.1.1d-0+deb10u5DSA-4855-1
opensslsource(unstable)1.1.1j-1
openssl1.0sourcestretch1.0.2u-1~deb9u4DLA-2565-1
openssl1.0source(unstable)(unfixed)

Notes

https://www.openssl.org/news/secadv/20210216.txt
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a51b9e1d0cf0bf8515f7201b68fb0a3482b3dc1 (OpenSSL_1_1_1j)

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