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authorCharles Fol <folcharles@gmail.com>2024-03-28 12:25:38 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2024-04-17 09:21:40 -0300
commitf9dc609e06b1136bb0408be9605ce7973a767ada (patch)
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parent59974938fe1f4add843f5325f78e2a7ccd8db853 (diff)
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iconv: ISO-2022-CN-EXT: fix out-of-bound writes when writing escape sequence (CVE-2024-2961)
ISO-2022-CN-EXT uses escape sequences to indicate character set changes
(as specified by RFC 1922).  While the SOdesignation has the expected
bounds checks, neither SS2designation nor SS3designation have its;
allowing a write overflow of 1, 2, or 3 bytes with fixed values:
'$+I', '$+J', '$+K', '$+L', '$+M', or '$*H'.

Checked on aarch64-linux-gnu.

Co-authored-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
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